23èmes Rencontres de Blois
Château de Blois

May 29 - June 3, 2011

Particle Physics and Cosmology

ABSTRACTS

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Only abstracts received up to 26/4/2011 are included in this compilation, in alphabetic order of speakers or presenters respectively.

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Elastic scattering at TeV energies - an overview

Fazale Aleem CHEP, Punjab University Lahore-54590, Pakistan

presented by: Fazale Aleem email-fazalealeem@hotmail.com, phone-+92-42-35715674, fax-+92-42-35715677

At Large Hadron Collider, measurements are planned for total and elastic scattering. This will help us have a feel of the hadrons. We give a brief account of theoretical predictions, with special reference to Geometrical models. We explore the picture of hadronic radii at these energies and compare it with results of other models.

Dark Matter indirect searches and tests of Lorentz invariance violation with the Fermi Large Area Telescope

Luca Baldini on behalf of the Fermi Large Area Telescope Collaboration INFN-Pisa

presented by: Luca Baldini email-luca.baldini@pi.infn.it, phone-+39 0502214438, fax-+39 0502214317

Since its launch in June 2008, the Fermi Gamma-ray Space Telescope has been observing the  high-energy Gamma-Ray sky (from 20 MeV to more than 300 GeV) with unprecedented sensitivity. In this talk I will briefly review some of the highlights from the first three years in orbit which are more directly connected with fundamental physics: the study of Gamma-Ray Bursts as laboratories for testing possible Lorentz invariance violations and the status of Dark Matter indirect searches, both in gamma-rays and in the electron/positron component of the cosmic radiation.

The KM3NeT deep sea neutrino telescope

Bruny Baret on behalf of the KM3NeT consortium Astroparticules et Cosmologie (APC) Paris

presented by: Bruny Baret email-baret@in2p3.fr, phone-0614048667, fax- 

In the context of multimessenger astronomy, high energy neutrinos provide a unique way to probe the non-thermal Universe in particular to identify the acceleration sites of high energy hadronic cosmic rays. To complement the sky coverage of the IceCube neutrino telescope now in operation at the South Pole and have access to specific sources like the galactic center, a kilometric scale detector is necessary in the northern hemisphere. The ANTARES, NEMO and NESTOR collaborations are working on a joint effort within the    KM3NeT consortium to build such a telescope in the deep of the Mediterranean see. We will review the main science reach of the project as well as the technical solutions resulting from the Design Study. KM3NeT is upported through the EU, FP6 Contract no. 011937 and FP7 grant agreement no. 212252.

Is Nature fundamentally continuous or discrete, and how can these two different but very useful conceptions be fully reconciled? Construction as to the Planckian regime of space time physics, for emergent gravity

Andrew Beckwith Chonquing University institute of theoretical physics

presented by: Andrew Beckwith email-rwill9955b@yahoo.com, phone-, fax-

Our contention, is that reality is actually analog, but that at a critical limit, as when the Octonian gravity condition kicks in, that for a time it appears discrete. This due to al phase transition at the start of the big bang. Our second consideration is, that symmetry breaking models, i.e. the Higgs boson are not necessary for the formation of particles with mass just before Octonionic gravity which could arise in pre Planckian physics models without a potential. Finally, the necessity of potentials for pre Octonionic gravity physics can be circumvented via Sherrer k essence physics.

The Final Results from the Sudbury Neutrino Observatory

SNO Collaboration Carleton University, Canada

presented by: Alain Bellerive email-alainb@physics.carleton.ca, phone-613-520-2600, fax-613-520-4061 

The Sudbury Neutrino Observatory (SNO) was a water Cherenkov detector dedicated to investigate elementary particles called neutrinos. It successfully took data between 1999 and 2006. The detector was unique in its use of heavy water as a detection medium, permitting it to make a solar model-independent test of solar neutrino mixing. In fact, SNO conclusively showed that solar neutrinos oscillate on their way from the core of the Sun to the Earth. This groundbreaking observation was made during three independent phases of the experiment. Even if data taking ended, SNO is still in a mode of precise determination of the solar neutrino oscillation parameters because all along SNO had developed several methods to tell charged-current events apart from neutral-current events. This ability is crucial for the final and ultimate data analysis of all the phases. The physics reach of a combined three-phase solar analysis will be reviewed together with results and subtleties about solar! neutrino physics. The publication of the three-phase paper is expected in April 2011, thus making the upcoming analysis the conclusion and the final results from the Sudbury Neutrino Observatory.

Finding Hubble Constant from Brightest Supernovae without the Cosmological Distance Ladder

S.Blinnikov,P.Baklanov,M.Potashov  ITEP,SAI,IPMU

presented by: Sergey Blinnikov email-Sergei.Blinnikov@itep.ru, phone-+7(499)123-7565,fax-+7(499)127-0833

We introduce a novel approach, a Dense Shell Method (DSM), to measuring distances for cosmology. It is based on the original Baade idea to relate absolute difference of photosheric radii with photospheric velocity. We demonstrate that this idea works perfectly for the most luminous Type IIn Supernovae on the rising part of their light curves. This allows us to derive distances to those objects directly making them good primary distance indicators for cosmology. Contrary to usual applications of type Ia supernovae this technique does not involve the Cosmological Distance Ladder.

Search for Neutrinoless Double Beta Decay with CUORE

CUORE Collaboration Genoa University 

presented by: Lucia Canonica email-lucia.canonica@ge.infn.it, phone-+390103536468, fax-

The Cryogenic Underground Observatory for Rare Events (CUORE) is an experiment to search for neutrinoless double beta decay (0nuDBD) in Te-130 and other rare processes. The observation of 0nuDBD would indicate that neutrinos are Majorana particles and would provide information about the absolute neutrino mass scale. CUORE is a bolometric detector composed of 988 TeO2 crystals, with the total mass of about 750 kg of natural Tellurium. We will discuss the status of the CUORE experiment, including recent R& D efforts, anticipated sensitivity, and present the most recent results from Cuoricino, the predecessor experiment operated in Gran Sasso National Laboratories in Italy.    

Direct dark matter searches with the LUX experiment

M.C. Carmona-Benitez on behalf of the LUX collaboration Case Western  Reserve University

presented by: M. Carmen Carmona-Benitez email-carmona@case.edu, phone-1 216 368 4890, fax-1 216 368 4671

The Large Underground Xenon (LUX) project will operate a large noble liquid detector to search for direct evidence of WIMPs, a leading model for the dark matter in the universe. LUX consists of a dual-phase time projection chamber containing 300 kg of liquid xenon, which is able to detect interactions via the production of ionization and scintillation. LUX is designed to be sensitive to a WIMP scattering cross section of 7 × 10-46 cm2 for a WIMP mass of 100 GeV, about two orders of magnitude below current limits. We will describe the experimental concept as well as the physics performance of the LUX experiment, which is currently in a commissioning phase at the Sanford Laboratory at Homestake in South Dakota.

SEARCH FOR LEPTON FLAVOUR VIOLATION WITH THE e+ DECAY: FIRST RESULTS FROM THE MEG EXPERIMENT

Paolo Walter Cattaneo on behalf of the MEG collaboration INFN Pavia

presented by: Paolo Walter Cattaneo email-paolo.cattaneo@pv.infn.it, phone-+390382987578,fax-+390382-423241

The goal of the MEG experiment is searching for the e+ decay, strongly suppressed in the Standard Model, but allowed to a much larger Branching Ratio in alternative models. MEG is expected to have a sensitivity of a few 10-13, almost two orders of magnitude better than the present experimental limit. Novel detectors were developed for this measurement as well as multiple and redundant calibrations. We have been taking data since 2008. We present here the preliminary results of the physics run taken during 2009 and anticipate a look to 2010 data .

Final results of the EDELWEISS-II WIMP search using a 4-kg array of cryogenic germanium detectors with interleaved electrodes

The Edelweiss Collaboration CEA,Centre d'Etudes Saclay, IRFU, 91191 Gif-Sur-Yvette Cedex, France Université de Lyon, Université Lyon 1, CNRS/IN2P3, 4 rue E. Fermi 69622 Villeurbanne cedex, France CNRS-Néel, 25 Avenue des Martyrs, 38042 Grenoble cedex 9, France CSNSM, Université Paris-Sud, IN2P3-CNRS, bat 108, 91405 Orsay, France Karlsruhe Institute of Technology, Institut f ür Experimentelle Kernphysik, Gaedestr.1, 76128 Karlsruhe, Germany Karlsruhe Institute of Technology, Institut für Kernphysik, Postfach 3640, 76021 Karlsruhe, Germany CEA, Centre d'Etudes Saclay, IRAMIS, 91191 Gif-Sur-Yvette Cedex, France Laboratory of Nuclear Problems, JINR, Joliot-Curie 6, 141980 Dubna, Moscow region, Russia Laboratoire Souterrain de Modane, CEA-CNRS, 1125 route de  Bardonnèche, 73500 Modane, France University of Oxford, Department of Physics, Keble Road, Oxford OX1 3RH, UK Department of Physics and Astronomy, University of Sheffield, Hounsfield Road, Sheffield S3 7RH, UK

presented by: Benjamin Censier email-censier@ipnl.in2p3.fr, phone-0618730405, fax-

The EDELWEISS-II collaboration has completed a direct search for WIMP dark matter with an array of ten 400g cryogenic germanium detectors allowing simultaneous measurement of heat and ionisation in operation at the Laboratoire Souterrain de Modane. A total effective exposure of 384 kg·d has been achieved, mostly coming from fourteen months of continuous operation. Five nuclear recoil candidates are observed above 20 keV, while  the estimated background is less than 3 events. The result is interpreted in terms of limits on the cross-section of spin-independent interactions of WIMPs and nucleons. New constraints are also set on inelastic WIMP-nucleon models.

Evidence for a new variability in Type Ia Supernovae from the Nearby Supernova Factory

N. Chotard, on behalf of the SNFactory collaboration Université de Lyon, F-69622, France ; Université de Lyon 1, Villeurbanne ; CNRS/IN2P3, Institut de Physique Nucléaire de Lyon

presented by: N. Chotard email-nchotard@ipnl.in2p3.fr, phone-+33472433596, fax-

Type Ia supernovae (SNe Ia) are used as standard candles to measure the history of the universe expansion.    However precise measurements need an empirical standardization of the luminosities usualy done with two parameters (stretch and color), as brighter SNe Ia exhibit a broader light curve, and redder objects are fainter. Employing the flux calibrated spectra sample obtained by the Nearby Supernova Factory, we show that there are two main components instead of one entering in the object color law, one related to spectral features, and one related to extinction by dust, and find a value of the total-to-selective extinction ratio RV in agreement with the Milky-Way value, as opposed by the low values found in standard approaches.

Constraints on Low Mass WIMPs from CDMS II

Jodi Cooley on behalf of the CDMS Collaboration  Southern Methodist University

presented by: Jodi Cooley email-, phone-, fax-

I will present constraints on light mass WIMPs obtained by the reanalysis of the Cryogenic Dark Matter Search (CDMS II) data taken in the Soudan Underground Laboratory, Minnesota, USA between October 2006 and September 2008. This data has been reanalyzed with a lower energy threshold to give increased sensitivity to interactions of WIMPs with masses below  10 keV/c2. This reanalysis provides stronger constraints than previous CDMS II results for WIMP masses below 9 GeV/c2 and excludes parameter space with possible low-mass WIMP signals from the DAMA/LIBRA and CoGeNT experiments.  

Inclusive W/Z cross section and W charge asymmetry measurements at the LHC.

The CMS Collaboration The CMS Collaboration Institutes

presented by: Georgios Daskalakis email-Georgios.Daskalakis@cern.ch, phone-+302106503535, fax-

Measurements of inclusive W and Z production cross sections and their luminosity-independent ratios as well as the lepton charge asymmetry in the inclusive W production are presented, for both electron and muon decay channels. The measurements are based on data recorded in proton-proton collisions at a center-of-mass energy of 7 TeV by the ATLAS and CMS experiments at the LHC. The results are compared with the theoretical predictions and it is expected to provide additional constraints on the parton distribution functions of the proton.

Searches for anisotropies of cosmic rays at the Pierre Auger Observatory

O. Deligny, for the Pierre Auger Collaboration IPN Orsay

presented by: O. Deligny email-deligny@ipno.in2p3.fr, phone-0033169155176, fax-0033169156470

We report on the analysis of the distribution of the arrival directions of ultra high energy cosmic rays detected at the Pierre Auger Observatory. From 2.1017 eV to 3.1019 eV, we present the results of searches for first harmonic modulations in the right-ascension distribution of cosmic rays and discuss the obtained upper limits which constitute the most stringent bounds at present above 2.1017 eV. At the highest energies, the observation of the flux steepening is consistent with the shortening of the horizon of ultra high energy cosmic rays and leads to the possibility of "cosmic ray astronomy". Thus, we present the analyses searching for correlation of cosmic rays with nearby extragalactic astrophysical objects.

Reactor sterile neutrinos, dark energy and the age of the universe

Jostein R. Kristiansen, Oystein Elgaroy Institute of theoretical astrophysics, University of Oslo, Norway 

presented by: Oystein Elgaroy email-oystein.elgaroy@astro.uio.no, phone-+4722855684, fax-+4722856505

There are indications that the neutrino oscillation data from reactor experiments and the LSND and MiniBooNE experiments show a preference for two sterile neutrino species, both with masses in the eV region. We show that this result has a significant impact on some important cosmological parameters. Specifically, we use a combination of CMB, LSS and SN1A data and show that the existence of two light, sterile neutrinos would rule out the cosmological constant as dark energy at 95 % confidence level, and lower the expansion age  of the universe to 12.58 ± 0.26 Gyr.

Open heavy flavours and quarkonia measurements with ALICE

B. Espagnon for ALICE collaboration  Université Paris-Sud, Institut de Physique Nucléaire; Orsay, Orsay, 91406 , France   

presented by: B. Espagnon email-espagnon@ipno.in2p3.fr, phone-+33 1 69 15 71 69, fax-+33 1 69 15 64 70

ALICE is the dedicated LHC experiment for the study of the hot and dense matter produced in heavy ion collision and expected to lead to Quark Gluon Plasma formation. Heavy flavours and quarkonia measurements are powerful observables to characterize the formed medium. After a brief presentation of the detector performance, latest physics results on open heavy flavours and on quarkonia obtained in p-p collisions at sqrt(s) = 7 TeV and in Pb-Pb at sqrt(s) = 2.76 TeV will be presented. We will conclude by a comparison with existing theoretical models.

Comprehensive Analysis of e+e-® ghc(2S)

Tie-Jun Gao, Tai-Fu Feng, Shu-Min Zhao Department of Physics, Dalian University of Technology, Department of Physics, Hebei University

presented by: Tie-Jun Gao email-450736866@qq.com, phone-, fax-

We discuss the production of hc(2S) through the process e+e-®ghc(2S), where the leading contribution originates from the 1-loop electroweak corrections. Adopting some reasonable light-cone distribution amplitudes, we analyze the cross section of this process versus the electron-positron center of mass energy. As the electron-positron center of mass energy Ös=3770MeV, the typical production cross section of this process is about 10-8b.

ICARUS and Status of the Liquid Argon Technology

M. Antonello, P. Aprili, B. Baibussinov, M. Baldo Ceolin, P. Benetti, E. Calligarich, N. Canci, F. Carbonara, S. Centro, A. Cesana, K. Cieslik, D. B. Cline, A. G. Cocco, A. Dabrowska, D. Dequal, A. Dermenev, R. Dolfini, C. Farnese, A. Fava, A. Ferrari, G. Fiorillo, D. Gibin, A. Gigli Berzolari, S. Gninenko, T. Golan, A. Guglielmi, M. Haranczyk, J. Lagoda, J. Holeczek, M. Kirsanov, J. Kisiel, I. Kochanek, S. Mania, G. Mannocchi, F. Mauri , A. Menegolli, G. Meng, C. Montanari, S. Otwinowski, T. J. Palczewski, L. Periale, A. Piazzoli, P. Picchi, F. Pietropaolo, P. Plonski, P. Przewlocki, A. Rappoldi, G. L. Raselli, M. Rossella, C. Rubbia, P. Sala, E. Scantamburlo, A. Scaramelli, E. Segreto, F. Sergiampietri, J. Sobczyk, D. Stefan, J. Stepaniak, R. Sulej, M. Szarska, M. Terrani, F. Varanini, S. Ventura, C. Vignoli, T. Wachala, H.-G. Wang, X. Yang, A. Zalewska, K. Zaremba, J. Zmuda  Laboratori Nazionali del Gran Sasso ;INFN, Dipartimento di Fisica e INFN, Università di Padova, Dipartimento di Fisica Nucleare e Teorica e  INFN, Università di Pavia, Dipartimento di Scienze Fisiche, INFN e Università Federico II Napoli, INFN Sezione di Milano and Politecnico, Milano, The Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Science, Krakow, Department of Physics and Astronomy, University of California, INR RAS, Moscow , CERN, Institute of Theoretical Physics, Wroclaw University, A. Soltan Institute for Nuclear Studies, Warszawa, Institute of Physics, University of Silesia, Katowice Laboratori Nazionali di Frascati (INFN), Institute for Radioelectronics, Warsaw Univ. of Technology Warsaw, Dipartimento di Fisica, Università di Pisa

presented by: Gianluca Raselli email-gianluca.raselli@pv.infn.it, phone-+39 0382985236, fax-+39 0382423241 

Icarus is the largest liquid Argon TPC detector ever built ( 600 ton LAr mass). It operates underground at the LNGS laboratory in Gran Sasso. It has been smoothly running since summer 2010, collecting data with the CNGS beam and with cosmics. Liquid argon TPCs are really "electronic bubble chambers" providing a completely uniform imaging and calorimetry with unprecedented accuracy on massive volumes. Icarus is internationally considered as a milestone towards the realization of next generation of massive detectors ( tens of ktons) for neutrino and rare event physics. Results will be presented on the data collected so far with the detector at LNGS.

Dark matter and baryon asymmetry of the Universe from R2 -inflation

Dmitry Gorbunov INR RAS

presented by: Dmitry Gorbunov email-gorby@ms2.inr.ac.ru, phone-+7(499)7839291, fax-+7(499)1352268

In R2-inflation scalaron slow roll is responsible for the inflationary stage, while its oscillations reheat the Universe. We found that the same scalaron decays induced by gravity can also provide the dark matter production and leptogenesis. With R2-term and three Majorana fermions added to the Standard Model, we arrive    at the phenomenologically complete theory capable of simultaneously explaining neutrino oscillations, inflation, reheating, dark matter and baryon asymmetry of the Universe. Apart of seesaw mechanism in neutrino sector, we use only gravity, which solves all the problems by exploiting scalaron.

Constraints on Dark Energy from the Supernova Legacy Survey 3 Year Data Set

J. Guy on behalf of the SNLS collaboration LPNHE, IN2P3 et universités Pierre et Marie Curie (UPMC) et Paris Diderot

presented by: J. Guy email-guy@lpnhe.in2p3.fr, phone-+33144274123, fax-+33144274758

We present the recent results from the analysis of the Supernova Legacy Survey 3-years data  sample. For the dark energy equation of state, assuming a flat universe, we measure a w parameter consistent with a cosmological constantwith a precision of 0.2. We have paid particular attention to the systematic uncertainties. We combine the SNe data with baryon acoustic oscillation measurements from the Sloan Digital Sky Survey (SDSS) and measurements of the cosmic microwave background power spectrum from the WMAP-7 year data, to obtain, under the flat universe hypothesis, a measurement of the dark energy equation of state w = -1.068 with a precision of 0.08.

Results of the commissioning phase of GERDA and short status report on neutrino-less double beta decay experiments

Jozsef Janicsko for the GERDA collaboration Technische Universitat Munchen,

presented by: Jozsef Janicsko email-janicsko@mytum.de, phone-+498928912475, fax-

The study of neutrinoless double beta decay (DBD) is the only known method to determine the Majorana nature of the neutrino. The observation of neutrinoless DBD would also represent a measurement of the effective mass if the nuclear matrix element is given. In this talk I will give a brief summary of the DBD experiments under preparation with emphasis on GERDA. GERDA is a new DBD experiment currently being commissioned at the INFN Gran Sasso National Laboratory, Italy. It is implementing a new shielding concept by operating bare Ge diodes - enriched in Ge-76 in liquid argon. The results from the current commissioning phase with natural Ge detectors will be discussed.

Phenomenology of Higgs-inflation

Dmitry Gorbunov INR RAS (Moscow)

presented by: Dmitry Gorbunov email-gorby@ms2.inr.ac.ru, phone-+7(499)7839291, fax-+7(499)1352268

The SM Higgs scalar potential can be modified in a specific way allowing for realization of an inflationary stage in the early Universe. There is a Higgs field-dependent cut-off in the model at high energy scale, where the theory has to be UV-completed. With a lack of explicit UV-completion one can however ask which phenomenology  might of been expected if higher order operators suppressed by the cut-off scale are considered. The study revealed that unexplained by the SM phenomena - neutrino oscillations, baryon asymmetry of the Universe (and even dark matter?) - might be understood in this case.

Causality, Special Relativity and Existence of Massless Material Particles

Mohammad Saleem and Mujahid Kamran Theory Group,CHEP, Punjab University, Lahore. PAKISTAN. 

presented by: Mujahid Kamran email-sibneyousuf@yahoo.com, phone-, fax-

There are two types of particles: material particles and gauge particles. When principle of causality was proposed, the physics community was not familiar with gauge particles. The principle of causality therefore applies only to material particles. We now know that photons which constitute light are gauge particles. The special relativity tells us that particles of zero rest mass can exist only if their velocity is equal to that of light. However, causality tells us that material particles cannot have the velocity of light (constituted by photons, the gauge particles). Therefore material particles of zero rest mass cannot exist in nature. Neutrinos, for instance, must be massive.

Direct Dark Matter and Axion Detection with CUORE   

Yury Kolomensky CUORE Collaboration

presented by: Yury Kolomensky email-yury@physics.berkeley.edu, phone-+1(510)486-7811, fax-+1(510)495-2957

The Cryogenic Underground Observatory for Rare Events (CUORE) is an experiment to search for neutrinoless double beta decay in Te-130 and other rare processes. CUORE is a bolometric detector composed of 988 TeO2 crystals, with the total mass of about 1 tonne. The large detector mass, low backgrounds, and the low energy threshold of a few keV make the experiment well suited for direct detection of galactic dark matter particles and solar axions. We discuss the development of a novel low-energy trigger that enables such searches, and present the preliminary results from a test run with four CUORE-like crystals at Gran Sasso National Laboratories in Italy.

Search for Neutrinoless Double Beta Decay with CUORE

Yury Kolomensky CUORE Collaboration

presented by: Yury Kolomensky email-yury@physics.berkeley.edu, phone-+1(510)486-7811, fax-+1(510)495-2957

The Cryogenic Underground Observatory for Rare Events (CUORE) is an experiment to search for neutrinoless double beta decay (0nuDBD) in Te-130 and other rare processes. The observation of 0nuDBD would indicate that neutrinos are Majorana particles and would provide information about the absolute neutrino mass scale. CUORE is a bolometric detector composed of 988 TeO2 crystals, with the total mass of about 750 kg of natural Tellurium. We will discuss the status of the CUORE experiment, including recent R& D efforts, anticipated sensitivity, and present the most recent results from Cuoricino, the predecessor experiment operated in Gran Sasso National Laboratories in Italy.

Results from 100 Live Days of XENON100 Data

The XENON collaboration Subatech

presented by: Jacob Lamblin email-jacob.lamblin@subatech.in2p3.fr, phone-, fax-

Weakly Interacting Massive Particles (WIMPs) are a well-motivated class of particles to  constitute a major fraction of the dark matter in the Universe. XENON100 is the current phase of the XENON dark matter program, which aims the direct detection of WIMPs with liquid xenon time-projection chambers. In 2010, first results after 11 live-days of data have shown that XENON100 reached the lowest background among all dark matter experiments world-wide. Recently, the analysis of 100.9 live-days of data led to the most stringent limit on dark matter interactions, excluding spin-independent elastic WIMP-nucleon scattering cross-sections above 7.0x10-45cm2 for a WIMP mass of 50 GeV/c2 at 90confidence level. These new results will be presented.  

Latest results from a search for neutrinoless double beta decay with NEMO-3 and plans for SuperNEMO

Karol Lang (on behalf of the NEMO Collaboration) NEMO Collaboration

presented by: NEMO Collaboration email-Karol Lang <lang@hep.utexas.edu>, phone-1 512 471 3528, fax-

The observation of neutrino oscillations has proved that neutrinos have mass and thus strengthened the interest in neutrinoless double beta decay experiments which provide the only practical way to determine whether neutrinos are Majorana or Dirac particles. The recently completed NEMO-3 experiment, located in the Modane Underground Laboratory in the Frejus Tunnel under the French-Italian Alps, has collected an unprecedented number of double-beta decays using a powerful technique for detecting a two-electron final state by employing an apparatus combining tracking, calorimetry, and the time-of-flight measurements. The experiment provides some of the best limits for a neutrinoless double-beta transitions. We will present the latest results from NEMO-3 and will discuss the status of SuperNEMO, the next generation experiment that will exploit the same experimental technique to extend the sensitivity of the current search.

Lepton Flavor Violation beyond the Standard Model and Stellar Collapse

Oleg Lychkovskiy, Sergei Blinnikov, Mikhail Vysotsky Institute for Theoretical and Experimental Physics, Moscow, Russia   

presented by: Oleg Lychkovskiy email-lychkovskiy@itep.ru, phone-, fax-

Physics of stellar collapse is extremely sensitive to lepton flavor violation (LFV). If lepton flavor violating processes beyond the SM occur in the protoneutron star, electron neutrinos may be equilibrated with muon and tau neutrinos. This affects the supernova dynamics and the supernova neutrino signal in several ways. In particular, the total neutrino luminosity in the first seconds of the collapse is increased due to the larger free path of the non-electron neutrinos. This effect may contribute to solving a supernova explosion problem. We discuss model-independent features of LFV in supernova and also some specific models beyond the SM with LFV. A relation between LFV in supernova and rare decays is also discussed.

Precision measurement of the solar neutrino flux with the Borexino detector 

Szymon Manecki on behalf of the Borexino Collaboration Virginia Tech, VA, USA

presented by: Szymon Manecki email-manecki@vt.edu, phone-+39 0862 437316, fax-+39 0862 410795

Borexino is a low threshold, calorimetric solar neutrino experiment located in the underground Gran Sasso Laboratory in Italy. Its unprecedented radiopurity allowed for the first time in history a direct, real-time measurement of the sub-MeV solar signal. After years of construction, for the first time data was collected in May 2007; Ever since, the measurements of 7Be neutrinos have continued to improve from an uncertainty of 25% toward 5% with 740 live days. An increased precision, measurement of the 8B signal, and the day night assymetry from Borexino data alone restrict the MSW neutrino oscillation to the LMA solution at 90% c.l.
The detector's design, present goals, and results will be presented in this talk.

Directional detection of Dark Matter with MIMAC

F. Mayet, J. Billard and D. Santos LPSC Grenoble

presented by: F. Mayet email-mayet@lpsc.in2p3.fr, phone-04-76-28-41-82, fax-04-76-28-40-04

Directional detection of galactic Dark Matter is a promising search strategy to identify genuine WIMP events amongst background ones. Using a dedicated statistical analysis, data of forthcoming directional detectors could lead either to a competitive exclusion or to a conclusive discovery or even to constraints on both the WIMP properties (mass and cross-section) and the WIMP velocity distribution in a quasi model independent way. MIMAC is a project of directional detection of Dark Matter using a matrix of micro-tpc chambers with a 3D reconstruction of recoil tracks. I will present several aspects of the MIMAC project : phenomenological studies, 3D track reconstruction analysis and experimental results  

MINOS Neutrino Oscillations Results

Rashid Mehdiyev University of Texas at Austin, Austin, Texas, USA

presented by: Rashid Mehdiyev email-rmehdi@fnal.gov, phone-630-840-5479, fax-

Main Injector Neutrino Oscillation Search (MINOS) experiment is a long-baseline neutrino oscillation experiment. I will present the new (updated) oscillation parameter results of recent analyzes based on a NuMI beam exposure of 7.1E20 protons-on-target (POT) in neutrino running mode and 1.7E20 POT in antineutrino running mode, also electron neutrino appearance results.

Interplay of energy dependent astrophysical neutrino flavor ratios and new physics effects

Poonam Mehta and Walter Winter Raman Research Institute, India and University of Wurzburg, Germany 

presented by: Poonam Mehta email-poonam@rri.res.in, phone-00918023610122, fax-00918023610492

We discuss the importance of flavor ratio measurements in neutrino telescopes, such as by measuring the ratio between muon tracks to cascades, for the purpose of extracting new physics signals encountered by astrophysical neutrinos during propagation from the source to the detector. The detected flavor ratios not only carry the energy information of specific new physics scenarios which alter the transition probabilities in distinctive ways, but also the energy dependent flavor composition at the source. We describe the interplay of these two energy dependent effects and identify which new physics scenarios can be distinguished from the detected flavor ratios as a function of astrophysical parameters.    

The Reactor Antineutrino Anomaly

G. Mention, M. Fechner, Th. Lasserre, Th. A. Mueller, D. Lhuillier, M. Cribier, A. Letourneau CEA / Irfu - Centre de Saclay - France, Astroparticules et Cosmologie APC - Paris - France - Research Center for Neutrino Science RCNS - Tohoku University - Japan

presented by: Th. A. Mueller email-tmueller@awa.tohoku.ac.jp, phone-0679230444, fax-

Recently, we provided new reactor antineutrino spectra for U and Pu isotopes increasing the mean flux by about 3 percent. To a good approximation, this reevaluation applies to all reactor neutrino experiments. With our new flux evaluation, the ratio of observed to predicted event rate for the < 100 m reactor-detector experiments leads to a deviation from unity at 98.6% C.L. which we call the reactor antineutrino anomaly. The compatibility of our results with the existence of a fourth non-standard neutrino state driving neutrino oscillations at short distances is discussed. We present the combined analysis of reactor data, gallium solar neutrino calibration experiments, and MiniBooNE-n data and new constraints on q13.

Test of lepton flavour violation and rare decays with the NA62/NA48 experiment at CERN

Cristina Lazzeroni (University of Birmingham), Riccardo Fantechi (CERN and INFN-Pisa)

presented by: Riccardo Fantechi email-cristina.lazzeroni@cern.ch, phone-00441214144614, fax-

The ratio of charged kaon leptonic decay rates BR(K ® e n)/BR(K ® mn) is suppressed and predicted to excellent precision within the Standard Model. A precision test of lepton flavour universality by measurement of this ratio at the NA62 experiment at CERN, based on a dedicated sample collected in 2007, is reported. A record accuracy of 0.5% has been achieved. This result constrains the parameter space of new physics models with extended Higgs sector (including supersymmetry). In addition, from a sample of 2 ×1011 kaon decays recorded by NA48/2, the limit on the lepton flavour violating decay K ® pmm, which is sensitive to the existence of Majorana neutrinos, has been improved by a factor of three with respect to  previous measurements. We also present a new high precision measurements of the branching fractions and the form factors of the K ® pl l decays, and stringent upper limits of CP violation and a possible forward-backward asymmetries.

Chiral effects in superfluids and the triangle anomaly 

Yasha Neiman, Yaron Oz Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv 69978, Israel

presented by: Yaakov Neiman email-yashula@gmail.com, phone-972-525615750, fax-972-36429306

I will present recent results involving chiral transport coefficients in superfluids. These include the anomaly-related transport terms discussed in arXiv:0906.5044, as well as some novel effects.

Estimation of mass and radius of quark stars

M.Noorafshan Hormozgan University

presented by: M.Noorafshan email-noorafshan.maryam@yahoo.com, phone-00989177324799, fax-

In this paper, we investigate the quark stars(strange stars) which are composed of quark matter >From its center to the surface. for this purpose,we use two model; MIT bag model and string-flip like model.in the bag model the energy of the system is the kinetic energy of all the particle in addition to a costant called B. we consider two cases for B;one of which is constant and the other, dependent on density. in stringe-flip like model, energy of each particle is calculated by use of schroding equation, the potential in Hamiltonian depends on density,and includes a confining potential. In this model, it is assumed that the potential is a linear or harmonic function of the relative inter-quark distance. we calculate the equation of states for each of these four cases, finally,mass and radius of quark stars is estimated by using the above equation of states that our results is in good agreement with experimental results.

Comments on CPT theorem.

V.A.Novikov ITEP,Moscow

presented by: Victor Novikov email-novikov@itep.ru, phone-7-499-1238393, fax-7-499-1238393   

We present a class of non-local quantum field theories in which the CPT invariance is violated while the Lorentz invariance is present.

Status and recent results of the ANTARES experiment

The ANTARES Collaboration Nikhef

presented by: Dimitris Palioselitis email-dimp@nikhef.nl, phone-+31205925018, fax- 

ANTARES is a neutrino telescope deployed in the Mediterranean sea at a depth of 2,5km. It consists of a three dimensional array of photomultiplier tubes distributed over 12 lines. ANTARES started data taking with a partial detector in 2007 and has been complete since May 2008. The PMT's detect Cerenkov light emitted by muons originating from charged current neutrino interactions near the detector. This information allows for a precise track reconstruction. The main scientific goal of ANTARES is the search for high energy cosmic neutrinos from astrophysical sources such as AGN's and GRB's. The design and status of the detector will be reviewed and results for neutrino point sources searches, high energy diffuse neutrino flux, dark matter and monopoles will be presented.

Non-Minimal Sneutrino Inflation

C. Pallis and N. Toumbas,  University of Cyprus Dept. of Physics

presented by: C. Pallis email-kpallis@auth.gr, phone-, fax-

We consider a model of chaotic inflation driven by the lightest right-handed sneutrino in presence of a non-minimal coupling of the inflaton to gravity. Inflation is followed by a Peccei-Quinn phase transition based on renormalizable superpotential terms, which resolves the strong CP and m problems of the MSSM provided that one related parameter of the superpotential is somewhat small. Baryogenesis occurs via non-thermal leptogenesis, which is realized by the inflaton decay. Confronting our scenario with a number of current observational data we  constrain the effective Yukawa coupling involved in the decay of the inflaton and the inflaton mass.

The Difference Between Hyperon Transverse Momentum Distributions in pp and p[`p] Collisions

Olga Piskunova Lebedev Physics Institute, Moscow

presented by: Olga Piskunova email-piskoun@sci.lebedev.ru, phone-+74991326317, fax-

The analysis of data on hyperon transverse momentum distributions, dNL0/dpt, that were gathered from various experiments (WA89, ISR, STAR, UA1, UA5 and CDF) reveals an important difference in the dynamics of multiparticle production in proton-proton vs. antiproton-proton collisions in the region of transverse momenta 0.3 GeV/c < pt< 3 GeV/c. Hyperons that are produced with proton beam display a sharp exponential slope in spectra at low pt, while those produced with antiproton beam do not. Since LHC experiments have proton projectiles, the spectra of multiparticle production at LHC should seem softer in comparison to the expectations, because the MC predictions were based on antiproton-proton collision data from Tevatron. From the point of view of the Quark-Gluon String Model, the most important contribution to particle production spectra in antiproton-proton reactions is due to antidiquark-diquark string fragmentation that is very interesting object for the further investigations. This study may have impact not only on the interpretation of LHC results, but also on cosmic ray physics and astrophysics, where baryon contribution into matter-antimatter asymmetry is being studied.

Reconciling heavy wino dark matter model with the relic  density and PAMELA data using Sommerfeld effect

Subhendra Mohanty*, Soumya Rao* and D.P. Roy** *Physical Research Laboratory, **HBCSE

presented by: Soumya Rao email-soumya@prl.res.in, phone-+91 79 26314765, fax-

In a wino LSP scenario the annihilation cross section of winos gravitationally bound in galaxies can be boosted by a Sommerfeld enhancement factor which arises due to the ladder of exchanged W bosons between the initial states. The boost factor obtained can be in the range S = 8500 if the mass is close to the resonance value of M = 4.486 TeV. In this paper we show that if one takes into account the Sommerfeld enhancement in the relic abundance calculation then the correct relic density is obtained for 4.55 TeV wino mass due to the enhanced annihilation after their kinetic decoupling. At the same time the Sommerfeld enhancement in the cc® W+ W- annihilation channel is sufficient to explain the positron flux seen in PAMELA data without significantly    exceeding the observed antiproton signal. We also show that (e- + e+) and gamma ray signals are broadly compatible with the Fermi-LAT observations. In conclusion we show that a 4.55 TeV wino DM can explain the positron and antiproton fluxes observed by PAMELA and at the same time give a thermal relic abundance of CDM consistent with WMAP observations.

Testing gravity on cosmological scales using X-ray luminous galaxy clusters

David Rapetti, Steven Allen, Adam Mantz, Harald Ebeling Dark Cosmology Centre (University of Copenhagen), KIPAC (Stanford/SLAC), NASA Goddard Space Flight Center, IfA (University of Hawaii)

presented by: David Rapetti email-drapetti@dark-cosmology.dk, phone-+45 353 25 935, fax-+45 353 20 617

>From the observed abundance of galaxy clusters, we obtain improved constraints on departures from General Relativity on large scales. Our data set consists of 238 clusters and follow-up observations of 94 of those. Using a new statistical framework that self-consistently produces simultaneous constraints on cosmology and observable-mass scaling relations, we account for survey biases, covariances and systematic uncertainties. We parametrize the linear growth rate of structure with a power law of the mean matter density to gamma. Allowing gamma and the dark energy equation of state to take any constant values, we find no evidence for departures from GR+LCDM. Our results highlight the power of X-ray cluster studies to constrain cosmology.

Chou-Yang Model for Proton-Proton Elastic Scattering at 14 TeV

Haris Rashid and Muhammad Ali Theory Group, CHEP,Punjab University, Lahore. PAKISTAN.

presented by: Haris Rashid email-sibneyousuf@yahoo.com, phone-, fax- 

The results for pp elastic scattering at 14 TeV will be available soon. The parameter values in the Chou-Yang  model are determined by making use of high energy pp scattering results in GeV range. The predictions for pp elastic scattering at 14 TeV are made by using this model. The comparison of theoretical results with the experimental data will determine the validity of this model at this energy.

A new regularized method with saving physical concepts

A. Refaei Islamic Azad University, Sanandaj branch

presented by: A. Refaei email-abr412@gmail.com, phone-+989183717050, fax-

In the one-loop approximation, effective potential for lf4 is calculated by using the Krein space quantization. Quantization in Krein space instead of Hilbert space has some interesting features. The auxiliary negative norm states, which are used in Krien space, play the regularization of the theory. We show that the effective potential is naturally finite and regularized. The physical interaction mass and the running coupling constant are calculated. Our effective potential is different from the usual Hilbert space calculation, however we show that the physical concepts do not change.

The Tevatron top forward-backward asymmetry and top polarization at LHC

Debajyoti Choudhury1, Rohini M. Godbole2,3, Saurabh D. Rindani4, Pratishruti Saha1  1.Department of Physics and Astrophysics, Delhi University, Delhi, India 2. Center for High Energy Physics, Indian Institute of Science, Bangalore, India 3. Theory Unit, CERN, Geneva, Switzerland 4. Theoretical Physics Division, Physical Research Laboratory, Ahmedabad, India

presented by: Saurabh Rindani email-saurabh@prl.res.in, phone-+917926314462, fax-+917926314460

We consider how the measurement of top polarization at the Tevatron can be used to characterize and discriminate among different new physics models that have been used to explain the anomalous top forward-backward asymmetry reported at the Tevatron. This has the advantage of catching the essence of parity-violating effect characteristic to the different suggested new physics models. Other observables constructed from these asymmetries are shown to be useful in discriminating between the models, even after taking into account the statistical errors. Finally, we discuss some signals at the LHC.

Probing anomalous tbW couplings in single top production at LHC using top polarization and decay distributions

Saurabh D. Rindani, Pankaj Sharma Theoretical Physics Division, Physical Research Laboratory,    Ahmedabad, India

presented by: Saurabh Rindani email-saurabh@prl.res.in, phone-+917926314462,  fax-+917926314460

We study the sensitivity of the LHC to anomalous tbW couplings in single top production in association with a W- boson, followed by semileptonic decay of the top. We calculate top polarization including the effects of these anomalous couplings at the LHC. The polarization of the top can be measured by means of the angular distributions of the decay products. We make predictions for the energy and angular distributions of the top decay products in the laboratory frame, obviating the need for full reconstruction of the top rest frame. We construct various asymmetries out of these distributions and obtain the sensitivity of these distributions to anomalous tbW couplings at centre-of-mass energies of 7 TeV and 14 TeV for realistic integrated luminosities.

Integral charge quark super symmetry

U.V.S.Seshavatharam and Prof.S.Lakshminarayana I-SERVE, Hyderabad, India and AU,India.

presented by: U.V.S.Seshavatharam. email-seshavatharam.uvs@gmail and lnsrirama@yahoo.com, phone-91-8106085844 and 91-9440557613, fax-

`Quark flavor' is a property of `strong interaction charge' and nowhere connected with `fermions' or `bosons'. There exists nature friendly `integral charge quark flavors'. If a `charged quark flavor' rests in a `fermionic container' it is a `quark fermion'. Similarly if a `charged quark flavor' rests in a `bosonic container' it is a `quark boson'. Strong interaction charge contains `multiple flavors' and can be called as the `hybrid charge quark'. No 3  quark fermions couples together to form a baryon and no 2 quark fermions couples together to form a meson. There exists integral charge quark fermions and quark bosons. In super symmetry, quark fermion and quark boson mass ratio is Y = 2.262218404 but not unity. Quark fermions convert into quark baryons and effective quark fermions convert into effective quark baryons. Similarly quark bosons convert into quark mesons. Effective quark baryons generates charged and unstable multi flavor baryons and light quark bosons ! couples with these charged baryons and generates doublets or triplets. Any two oppositely charged quark mesons generates neutral and unstable mesons.

Physics of Rotating and Expanding Black Hole Universe

U.V.S. Seshavatharam I-SERVE, Hyderabad, India.

presented by: U.V.S.Seshavatharam email-seshavatharam.uvs@gmail , phone-91-8106085844 , fax-

Throughout its journey universe follows strong gravity. Planck particle can be considered By unifying general theory of relativity and quantum mechanics a simple derivation is given for rotating black hole's temperature. It is shown that when the rotation speed approaches light speed temperature approaches Hawking's black hole temperature. Applying this idea to the cosmic black hole it is noticed that there is "no cosmic temperature" if there is "no cosmic rotation". Starting from the planck scale it is assumed that- universe is a rotating and expanding black hole. Another key assumption is that at any time cosmic black hole rotates with light speed. For this cosmic sphere as a whole while in light speed rotation "rate of decrease" in temperature or "rate of increase" in cosmic red shift is a measure of "rate of  cosmic expansion". Since 1992, measured CMBR data indicates that, present CMB is same in all directions equal to 2.726 ° K, smooth ! to 1 part in 100000 and there is no continuous decrease! This directly indicates that, at present rate of decrease in temperature is practically zero and rate of expansion is practically zero. Universe is isotropic and hence static and is rotating as a rigid sphere with light speed. At present galaxies are revolving with speeds proportional to their distances from the cosmic axis of rotation. If present CMBR temperature is 2.726 ° K, present value of obtained angular velocity is 2.17×10-18 [(rad)/(sec)] @ 67 [(Km)/(sec.Mpc)]. Present cosmic mass density and cosmic time are fitted with ln([Present volume/Planck volume]). Finally it can be suggested that dark matter and dark energy are ad-hoc and misleading concepts.

Role of Avogadro number in grand unification

U.V.S.Seshavatharam and Prof.S.Lakshminarayana I-SERVE, Hyderabad,India and AU, India

presented by: U.V.S.Seshavatharam email-seshavatharam.uvs@gmail and lnsrirama@yahoo.com, phone-91-8106085844 and 91-9440557613, fax-

`N' being the Avogadro number it is suggested that strong nuclear gravitational constant (GS) is N2 times the    classical gravitational constant (GC). (GS) plays a vital role in strong interaction and nuclear space-time curvature. This new subject can be termed as `strong nuclear gravity'. Based on strong nuclear gravity and super symmetry it is noticed that (h/2p) is a secondary physical constant. Previously proposed 2 strong interaction fermions rest masses revised to 105.3226825 MeV and 11460.81321 MeV. Previously proposed super symmetry fermion-boson mass ratio is revised to 2.262218404. Nuclear charge radius, mole radius and gram mole are discussed. Charged lepton rest masses fitted accurately. New heavy charged lepton is predicted at 42262 MeV. Up and down quark mass ratio is equal to sinqW. Quark masses, QCD scale, nucleons rest masses, strong coupling constant, Fermi's weak coupling constant and semi! empirical mass formula energy constants are fitted. It can be suggested that top quark boson and electroweak W± charged boson both are same. Z0 boson constitutes 2 oppositely charged higg's bosons or it constitutes one W± and gluonic form of charged higg's boson. Third alternative is that the new heavy charged lepton pair transforms into a pair of neutral boson having a neutral mass 2([42262/2.262]) @ 37.364 GeV and makes the Z0 with sinqWcosqW as usual. Finally it can be suggested that nuclear and particle physics can be studied in the view of `strong nuclear gravity' and super symmetry.

Impact of employing the PT-symmetric Higgs mechanism on the Hierarchy problem

Abouzeid M. Shalaby Math and Physics Department, College of Arts and Sciences, Qatar University, Doha, Qatar

presented by: Abouzeid M. Shalaby email-amshalab@qu.edu.qa, phone-(+974) 4403-4630,  fax-(+974) 403-4601

Very recently, the Large Hadron Collider was turned on. There, the experiments are aiming to test different scenarios for elementary particles interactions from SUSY, Extra dimensions to others. In fact, SUSY was invented to kill the conceptual problems existing in the  conventional Standard model i.e. the Hierarchy problem. However, in recent years, certain theories which was rejected in the past like the wrong sign f4 theory is now well known to be a truly physically acceptable theory. Here, we analyze the renormalization group flow of the different parameters in the theory. We find that, rather than the conventional f4 theory and because the theory is asymptotically free, it does not suffer from the catastrophic blow up of the mass parameter at UV scales. These results agrees well with our non-perturbative calculations presented in PHYSICAL REVIEW D 82, 085013 (2010). This feature greatly recommends that this theory is a plausible candidate to play the role of the SU(2)×U(1) symmetry breaking in the standard model. According to this picture; the Higgs particle was massless in the far past. Moreover, the cosmological constant problem as a Hierarchy problem may be solved too.

Time Evolution of Dark Energy Field Configurations and Masses of Objects formed by the Gravitational Collapse

Anupam Singh L.N.Mittal I.I.T.

presented by: Anupam Singh email-singh@alumni.cmu.edu, phone-+911412689011, fax-

Dark Energy is the dominant component of the Energy Density of the Universe. It is imperative to understand the gravitational dynamics of Dark Energy and its implications. The most promising candidate for dark energy is the energy density of fields in curved space-time. We describe the formalism to study the time evolution and gravitational dynamics of dark energy field configurations given any general potential for the dark energy fields. We apply this formalism to models of dark energy motivated by particle physics considerations. We explicitly study the time evolution of the energy density of the fields in addition to studying the dynamics of the fields themselves. The study of the gravitational dynamics allowed us to demonstrate the gravitational collapse of dark energy field configurations. The study of the time evolution of the energy density allows us to compute the masses of objects formed by the gravitational collapse of dark energy field configurations. We will report on the masses of objects formed by the gravitational collapse of dark energy field configurations.

Recent Highlights from the Fermi Large Area Telescope

David A. Smith, for the Fermi LAT collaboration CENBG/ IN2P3 / CNRS Centre d'Etudes Nucleaires de Bordeaux-Gradignan B.P. 120, Gradignan 33175 France

presented by: David A. Smith email-smith@cenbg.in2p3.fr.fr, phone-+33 5 57 12 08 91, fax-

The Fermi Gamma-ray Space Telescope will soon finish its third year on orbit, and the flood of results continues to match our high pre-launch hopes. GeV gamma rays are produced mainly by high-energy particle interactions and the Large Area Telescope's sky survey allows study of cosmic accelerators. Active Galactic Nuclei,    gamma-ray bursts, pulsars, pulsar wind nebulae, and binary sources are the main source classes. Diffuse Galactic gamma radiation, Solar System gamma-ray sources, and energetic radiation from supernova remnants are likely tracers of high-energy particle interactions with matter and photon fields. They generate a  bright foreground that must be mastered as part of any sensitive search for dark matter signatures. This talk will focus on some recent highlights from Fermi.

New bounds on neutrino magnetic moments

A. Studenikin  Moscow State University and JINR-Dubna, Russia

presented by: A. Studenikin email-studenik@srd.sinp.msu.ru, phone- , fax-

A short review on neutrino electromagnetic properties is presented. In particular, developments in studies, both theoretical experimental, of neutrino magnetic moments are discussed. The recent claim that through an enhancement of the neutrino magnetic moment scattering cross section, due to atomic ionization effects in Ge detectors, a there is a significant mprovement of the best upper limit for the neutrino magnetic moment is critically analyzed.

References  

1. K.Kouzakov, A.Studenikin, Magnetic neutrino scattering on atomic electrons revisted, Phys.Lett.B 696 (2011) 252-256; 2. C.Giunti, A.Studenikin, Electromagnetic properties of neutrino, Phys.Atom.Nucl. 73 (2009) 2089-2125.

Scalar Field Cosmology - Improving the Cosmological Evolutional Scenario

Orest Hrycyna, Marek Szydlowski, Adam Krawiec Department of Theoretical Physics, The John Paul II Catholic University of Lublin, Astronomical Observatory, Jagiellonian University, Mark Kac Complex Systems Research Centre, Jagiellonian University

presented by: Marek Szydlowski email-marek.szydlowski@uj.edu.pl, phone-+48 12 425 1457, fax-+48 12 425 1318

We study evolution of cosmological models filled with the scalar field and barotropic matter. We consider the scalar field minimally and non-minimally coupled to gravity. We demonstrated the growth of degree of complexity of evolutional scenario through the description of matter content in terms of the scalar field. In study of all evolutional paths for all initial conditions methods of dynamical systems are used. We have found in scalar field cosmology with the non-minimal coupling a generic solution uniting the cosmological epochs. For all these solutions the de Sitter solution is a global attractor. We have investigated in details the twister type solution uniting the cosmological epochs and its significance for the description of the Higgs inflation caused by the Higgs potential of the scalar field.

Post-exponential decay: possible effects in astrophysics.

Krzysztof Urbanowski Institute of Physics, University of Zielona Gora, Poland

presented by: K. Urbanowski email-K.Urbanowski@proton.if.uz.zgora.pl, phone-+48 68 3282919, fax-+48 68 328 2920 

Properties of the decay law at long, post-exponential times t are studied. In particular properties of an instantaneous energy of unstable particles generated by the non-exponential behavior of the survival amplitude in the post-exponential time region are considered. Analyzing the transition time region between exponential and non-exponential form of the survival amplitude it is found that the instantaneous energy of the unstable state can take very large values, much larger than the energy of this state for t from the exponential time region. Taking into account results obtained for a model considered, it is hypothesized that this purely quantum mechanical effect may be responsible for the properties of broad resonances as well as having astrophysical and cosmological consequences, eg. this effect may be responsible for equipping of decay products with ultra high energies.

Neutrino physics and dark matter searches at SNOLAB

Eric Vazquez-Jauregui SNOLAB

presented by: Eric Vazquez-Jauregui email-ericvj@snolab.ca, phone-1-705-692-7000 x2292, fax-1-705-692-7001   

SNOLAB is an underground laboratory with an extensive experimental program in Astroparticle Physics focused on neutrino physics, such as double beta decay, solar and supernova neutrinos, and dark matter research. The international facility is located near Sudbury Ontario Canada in the Vale Creighton Mine at a depth of 2 km to shield experiments from cosmic rays. The laboratory provides infrastructure and support within a clean environment (better than class 2000) to avoid contamination. SNOLAB is an expansion of the laboratory constructed for the successful experiment SNO (Sudbury Neutrino Observatory).
Currently running experiments are DEAP-1, Picasso and COUPP. DEAP-1 is a 7 kg liquid-argon prototype detector with 2 PMTs to demonstrate pulse-shape discrimination between electromagnetic events and nuclear recoils for spin-independent WIMP interactions, PICASSO is a dark matter experiment based on superheated liquid technique sensitive to spin-dependent interactions with 19F nuclei, and COUPP is a bubble chamber for WIMP detection using a quartz jar filled with iodotrifluoromethane (CF3I) sensitive to both spin-dependent and spin-independent WIMP interactions.
The experiments under design are SNO+, HALO, DEAP-3600 and MiniCLEAN. SNO+ is a liquid scintillator detector to study pep and CNO solar neutrinos, geoneutrinos, reactor and supernova neutrinos, and search for neutrinoless double beta decay by adding neodymium to the liquid scintillator, HALO is a neutrino detector for the observation of galactic supernovas using 80 tons of existing lead and 3He neutron detectors; while DEAP3600  and MiniCLEAN are single phase detectors of LAr or LNe for direct detection of dark matter using scintillation light.
SNOLAB has been progressively creating a significant amount of space for active international research on Astroparticle Physics that contributes to the world programme of underground facilities. The status of the experimental programme at SNOLAB is presented in this talk.

Impact of interacting dark sector on Cosmic Microwave Background Radiation

Murli Manohar Verma Department of Physics, Lucknow University 

presented by: Murli Manohar Verma email-sunilmmv@yahoo.com, phone-+91-5222740140, fax-+91-522-2740410

It has been shown earlier that an arc-like pattern found on the Cosmic Microwave Radiation may result from the decay of dark matter particles initiating near particle horizon in the Q-phase of the interacting cosmological constant (ICC) model. In the present work, an investigation is made into how the corresponding decay of such dark matter particles might influence these signatures, in view of the recent data from PLANCK and the diffuse glow of the anomalous microwave radiation. We also discuss the constraints on such decay imposed by the interaction of the cosmological constant with the background. These predictions made in the ICC model can be verified in the concordance space of multiple observations.

FAST MATRIX-ELEMENT RESUMMATIONS WITH SECTOR SHOWERS

JUAN J. LOPEZ-VILLAREJO, PETER SKANDS CERN THEORY GROUP

presented by: JUAN J. LOPEZ-VILLAREJO email-jj.lopezvillarejo@cern.ch, phone-, fax-

A comparison will be drawn among the two approaches to dipole-antenna showering in Vincia: sector and global. Vincia (Giele-Kosower-Ritzmann-Skands) is a plugin to the event generator Pythia 8 based on the dipole-antenna picture of QCD, which focusses on describing quark and gluon radiation with high precision. Also, an status report of the implementation of the initial state shower in Vincia will be provided, in particular of the reaction gg->H.

Photon "mass" and atomic levels in a superstrong magnetic fields

B.Machet, M.I.Vysotsky LPTHE (Univ. Paris 06), ITEP (Moscow)

presented by: Mikhail Vysotsky email-vysotsky@itep.ru, phone-+7 905 5450793, fax-+7 499 8839601

We obtain an analytical formula which describes the dependence of the electric potential of a point-like charge on the distance away from it in the direction of an external magnetic field B. The deviation from Coulomb's law becomes essential for B > 3 pBcr/a = 3 pme2/e3 » 6 ·1016 G. In such superstrong fields, electrons are ultra-relativistic except those which occupy the lowest Landau level (LLL). The energy spectrum on which LLL splits in the presence of the atomic nucleus is found analytically. For B > 3 pBcr/a it substantially differs from the one obtained without accounting for the modification of the atomic potential.    

Centrality in relativistic nuclear collisions and nearest-neighbor spacing distributions

z.wazir COMSATS Institute of Information Technology,Islamabad

presented by: z.wazir email-zafar_ wazir@comsats.edu.pk, phone-, fax- 

Using the Random Matrix Approach, the results for the nearest-neighbor distributions obtained from experimental data on 12CC collisions at 4.2 A GeV/c and simulations produced with the aid of the ultra relativistic Quantum Molecular Dynamics model has been studied. The comparison reveals the lower limit of the multiplicity of secondary charged particles which can be associated with the onset of central collisions. Based on this result the nearest neighbor distributions for different multiplicities can be used to detect the region of central collisions.

CMB polarisation results from QUIET

Ingunn Kathrine Wehus for the QUIET collaboration University of Oslo, Current address: Imperial  College London

presented by: Ingunn Kathrine Wehus email-i.k.wehus@fys.uio.no, phone-+4795797639, fax-+44 (0)20 7594 7844

From its location 5080m above sea level in the Atacama desert in Chile, the QUIET telescope uses the latest radiometer technology to measure the polarisation of the cosmic microwave background (CMB). The pilot phase data taking was finished in December 2010, consisting of around 25 000 diode hours of Q-band data at 43Ghz and about a hundred times more W-band data at 95GHz. The first Q-band data analysis is now finished, while the W-band analysis is currently ongoing. I will present our first results, including CMB power spectra and foreground findings, and I will briefly discuss further prospects.

Constraints on a Randall-Sundrum II braneworld metric of the black hole at the Galactic Center

Alexander Zakharov Institute of Theoretical and Experimental Physics

presented by: Alexander Zakharov email-zakharov@itep.ru, phone-+7-499-1507540, fax-+7-499-1507540

Theories with extra dimensions admit astrophysical objects (supermassive black holes in particular) which are rather different from standard ones. People proposed tests which may help to discover signatures of extra dimensions in supermassive black holes since the gravitational field may be different from the standard one in the GR approach. So, gravitational lensing features are different for alternative gravity theories with extra dimensions and general relativity.

Recently, Bin-Nun (2010) discussed an opportunity that the black hole at the Galactic Center is described by the tidal Reissner- Nordström metric which may be admitted by the Randall-Sundrum II braneworld scenario. Bin-Nun suggested an opportunity of evaluating the black hole metric analyzing (retro-)lensing of bright stars around the black hole in the Galactic Center. Doeleman et al. (2008) evaluated a shadow size for the black hole at the Galactic Center. Measurements of the shadow size around the black hole may help to evaluate parameters of black hole metric. We derive an analytic expression for the black hole shadow size as a function of charge for the tidal Reissner- Nordström metric. We conclude that observational data concerning shadow size measurements are not consistent with significant negative charges, in particular, the significant negative charge Q/(4M2)=-1.6 (discussed in  Bin-Nun (2010)) is practically ruled out with a very high probability (the charge is roughly speaking is beyond 9s confidence level, but a negative charge is beyond 3s confidence level).

SM Higgs production cross sections and BRs

Marco Zaro CP3 - Center for Cosmology, Particle Physics and Phenomenology, UCLouvain

presented by: Marco Zaro email-marco.zaro@uclouvain.be, phone-+32 1047 3232, fax-+32 10 45 21 83

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