Dr
Laurette Ponce
(CERN)
3/14/11, 8:30 AM
Charalampos Anastasiou
(ETH Zurich)
3/14/11, 8:50 AM
The accuracy of theoretical predictions for the production of the Higgs boson at hadron colliders is an important topical issue. Inclusive Higgs production originates from simple processes, very similar kinematically to Drell-Yan production which is a flagship of precision physics at hadron colliders. However,
the predominantly gluonic initial state, the non-classical coupling of the...
Mr
Pierluigi Totaro
(INFN Sezione di Padova)
3/14/11, 9:20 AM
We present the current status of searches for a low mass
(below 135 GeV/c^2) SM Higgs boson
using data collected at the Fermilab Tevatron collider in
proton-antiproton collisions at the center of mass energy 1.96 TeV.
We focus in particular on ongoing efforts to improve overall search
sensitivity through improvements to our analysis methods
and techniques. We project that these...
Dr
Konstantinos Alexandros Petridis
(The University of Manchester)
3/14/11, 9:40 AM
We present the results of searches for the Standard Model Higgs
boson decaying predominantly to W+W- and ZZ pairs, at a center-of-mass energy of $\sqrt{s}=$1.96 TeV, using up to 8.1 fb$^{-1}$ of data collected with the CDF and D0 detectors at the Fermilab Tevatron collider.
The improvements of the analysis techniques and inclusion of additional channels are discussed. The combination of...
Prof.
Markus Schumacher
(Albert-Ludwigs-Universität Freiburg)
3/14/11, 10:00 AM
The first searches for Higgs bosons in the Standard Model and its extensions with the ATLAS detector are discussed. The findings are
based on the 2010 LHC pp-collision data taken at a center-of-mass
energy of 7 TeV. An overview of the results and their interpretation
will be given.
Dr
Christian Veelken
(University of California, Davis)
3/14/11, 10:40 AM
The production of pairs of oppositely-charged tau leptons at 7 TeV center-of-mass energy is studied with 36/pb of proton-proton collision data collected by the CMS experiment in 2010. Events are selected in a combination of different final states resulting from hadronic and leptonic tau decays. The Z to tau tau cross section is measured. The tau pair kinematics is fully reconstructed using a...
Dr
Bodhitha Jayatilaka
(Duke University)
3/14/11, 11:00 AM
We present a new combination of searches for a standard model Higgs Boson by the CDF and D0 experiments at the Fermilab Tevatron. This combination, covering possible Higgs boson masses between 130 GeV/c^2 and 200 GeV/c^s and emphasizing the H->WW and H->ZZ decay channels, utilizes 7.1/fb of data collected at CDF and 8.1/fb of data collected at D0. We present 95% CL upper limits on standard...
Christophe grojean
(CERN)
3/14/11, 11:15 AM
Vivek Sharma
(University Of California - San Diego La Jolla USA)
3/14/11, 5:00 PM
Mr
Mika Vesterinen
(University of Manchester)
3/14/11, 5:50 PM
Recent measurements of W and Z boson production properties from the Tevatron are presented.
Mr
John Alison
(University of Pennsylvania)
3/14/11, 6:10 PM
With over 45/pb of 7 TeV pp collisions recorded, the Atlas
standard model physics program is well under way.
This talk surveys our latest tests of the standard model at this
unprecedented energy scale.
An overview of recent results will be given.
Measurements of electro-weak boson properties, top-quark production,
and di-boson production will be highlighted.
Martina Hurwitz
(Lawrence Berkeley National Lab)
3/14/11, 6:50 PM
Measurements involving pairs of electroweak gauge bosons (dibosons) are important tests of the Standard Model. The D0 and CDF experiments at the Tevatron have measured diboson cross sections in several different decay modes and have set limits on triple gauge couplings with these results. Diboson measurements also present an important benchmark in the search for the Higgs boson. I will...
Dr
Gero von Gersdorff
(Ecole Polytechnique)
3/14/11, 7:10 PM
I review models of electroweak breaking in warped extra dimensions.
Dr
Tim Scanlon
(Imperial College London)
3/14/11, 7:55 PM
The CDF and D0 Collaborations at the Tevatron have an extensive programme of searches for "Beyond the Standard Model" Higgs bosons. Recent searches will be presented, covering the Minimal Supersymmetric Standard Model (MSSM), Next-to-MSSM, Hidden Valley and Fermiphobic Higgs sectors, using data sets corresponding to integrated luminosities of up to 8.2 invfb.
Ana M. Teixeira
(LPC Clermont)
3/15/11, 8:30 AM
We briefly review the most important aspects of the NMSSM. We discuss the impact of the NMSSM on low-energy observables, for dark matter as well as NMSSM specific signatures at colliders. We then briefly consider some NMSSM realisations and how these can be experimentally tested.
Colin Bernet
(CERN Geneva Switzerland)
3/15/11, 8:55 AM
Dr
Manuel Perez-Victoria
(University of Granada)
3/15/11, 9:20 AM
I will explain how SU(3)xSU(2)xU(1) gauge invariance can be used to classify all possible extra vector bosons in arbitrary extensions of the Standard Model. The full symmetry also restricts their interactions significantly, and leads to a model independent parametrization. I will then present updated/new limits on the couplings and masses of the new vector particles, arising from global fits...
Dr
Michel Jaffré
(Laboratoire de l'Accélérateur Linéaire)
3/15/11, 9:40 AM
New results from searches of physics beyond the standard model, extracted from data collected by the CDF and D0 experiments at the Fermilab Tevatron, will be presented.
Alessandro Strumia
(Pisa Univ & INFN & NICPB)
3/15/11, 10:20 AM
We discuss implications of the first LHC results about supersymmetry and large extra dimensions. In particular we derive the new dominant bound on tree-level graviton exchange from pp -> jj data
Dr
Sascha Caron
(University of Freiburg)
3/15/11, 10:40 AM
First ATLAS searches for signals of Supersymmetry in proton-proton
collisions at the LHC are presented.
These searches are performed in various channels containing
different lepton and jet multiplicities in the final states;
the full data sample recorded in the 2010 LHC run, corresponding
to an integrated luminosity of 35 pb-1, has been analysed.
The limits on squarks and gluinos are the...
Max Baak
(CERN Geneva Switzerland)
3/15/11, 11:05 AM
Dr
Francesco Santanastasio
(University of Maryland)
3/15/11, 5:20 PM
We discuss the results of searches for various new physics phenomena in the pp collisions at 7 TeV delivered by LHC and collected with the CMS detector in 2010. While the sensitivity of these early searches varies, in many cases they set the most stringent limits on these new physics phenomena. These results demonstrate good understanding of the detector and backgrounds in a variety of...
Prof.
Douglas Gingrich
(University of Alberta/TRIUMF)
3/15/11, 5:45 PM
We present the first results of searches for New Physics with the ATLAS detector using the 2010 LHC pp-collision data at sqrt{s} = 7 TeV. After a few months of operations, these searches already go beyond the reach of previous experiments, and start to explore new territories.
Dr
Daniel Litim
(University of Sussex)
3/15/11, 6:55 PM
Extra-dimensional models with a fundamental Planck scale as low as the electro-weak scale offer an excellent opportunity to test the quantization of gravity at colliders. If gravity becomes asymptotically safe, its high-energy behaviour is governed by a fixed point of the renormalisation group. I discuss the asymptotic safety scenario for gravity and experimental signatures at colliders for...
Mr
Julien Baglio
(Laboratoire de physique théorique d'Orsay)
3/15/11, 7:15 PM
MSSM Higgs bosons are the most promising way to discover Higgs physics at hadronic colliders since their cross section is enhanced compared to that of the Standard Model. In this talk I will present SUSY Higgs bounds on the [tan beta ; MA] plane in light of the uncertainties affecting the theoretical predictions at the Tevatron and the LHC.
Ms
Kathryn Tschann-Grimm
(Stony Brook University)
3/15/11, 7:23 PM
This presentation reviews the search for the Standard Model Higgs boson at the D0 experiment with the final state containing two taus and at least two jets. Data from Run 2b of the D0 experiment are used with an integrated luminosity of 4.3 1/fb. This final state is sensitive the production mechanisms gluon gluon fusion, vector boson fusion, and associated Higgs production with a W or Z,...
Mrs
Ruchika Nayyar
(Phd Student)
3/15/11, 7:31 PM
We present a search for the standard model (SM) Higgs boson optimized
in the decay channel $H\rightarrow W^+W^-$, where both W bosons decay
leptonically. The final state considered contains dileptons
$(ee,\mu\mu,e\mu)$ and large missing transverse energy from the
neutrinos. A multivariate analysis is used to supress the
background. No signifiant excess above the SM background has...
Mr
Josh Bendavid
(Massachusetts Institute of Technology)
3/15/11, 7:39 PM
We present a measurement of the lepton charge asymmetry in pp->W->lnu decays at sqrt(s)=7 TeV with the CMS detector at the LHC. Results are presented corresponding to 36 pb^-1 of integrated luminosity for both the electron and muon channels in 6 bins of lepton pseudorapidity up to |eta|=2.4 and |eta|=2.1 respectively. The measurements are compared with theoretical predictions and the results...
Mr
Devdatta Majumder
(TIFR, Mumbai)
3/15/11, 7:47 PM
The measurement of the inclusive cross section for W+gamma production is presented based on 36 pb-1 of data acquired with the CMS detector from 7 TeV LHC collisions in 2010. Comparisons are made with the predictions of the standard model. The W bosons are identified through their leptonic decays to electrons and muons. The W+gamma cross section is sensitive to anomalous triple-gauge couplings...
Mr
Nhan Tran
(Johns Hopkins University)
3/15/11, 7:55 PM
With approximately 35/pb of LHC proton-proton collision data collected by CMS we study the Drell-Yan process qqbar -> Z -> l+l-. Differential cross sections with respect to the invariant mass, rapidity, and transverse momentum are presented. The forward-backward asymmetry is measured as a function of the di-lepton invariant mass, and an analysis of the fully differential distribution leads to...
Ms
Aimee Larner
(University of Oxford)
3/15/11, 8:03 PM
YSF (Young Scientists Forum)
A study of Z -> tau tau decays has been performed with the ATLAS experiment at the LHC. The channel with one tau lepton decaying into an electron or muon and the second one into hadrons has been analyzed. The study is based on a data sample corresponding to an integrated luminosity of 8.3 pb-1 for the electron channel and 8.5 pb-1 for the muon channel, at a proton-proton centre-of-mass energy...
Mr
abdollah Mohammadi
(IPM and Shiraz University)
3/15/11, 8:11 PM
Ordinary
Prof.
Ulrich Nierste
(TTP, Karlsruhe Institute of Technology)
3/16/11, 8:30 AM
The 2010 data on quark flavour physics reveal a considerable tension
with the Standard Model. However, an excellent fit is found if one
permits new physics in the amplitudes describing meson-antimeson mixing
in the B_d and B_s systems. The corresponding global analysis disfavours
the Standard Model at the level of 3.6 standard deviations and calls for
new sources of CP violation in the...
Liang Li
(Fermilab Batavia USA)
3/16/11, 8:55 AM
Dr
Jernej Kamenik
("Jozef Stefan" Institute)
3/16/11, 9:15 AM
Polarisation observables in top quark decays are sensitive probes of possible new physics contributions to the interactions of the heavy third generation quarks. Within an effective theory approach such new physics contributions can be classified in terms of several higher dimensional operators. We investigate the interplay between indirect constraints on such operators, coming mainly from...
Dr
Fabrizio Margaroli
(Purdue University)
3/16/11, 9:35 AM
Susanne Westhoff
(Mainz University)
3/16/11, 9:55 AM
I discuss the anomalously large asymmetry in top-antitop-quark production within Randall-Sundrum models. Kaluza-Klein gluons generically have the potential to generate a large forward-backward asymmetry at tree level. In models with an anarchic flavour structure, however, their coupling to the light quarks inside the proton is strongly suppressed. I show that even though this suppression is...
Andreas Weiler
(CERN Geneva Switzerland)
3/16/11, 10:35 AM
Dr
John Walsh
(INFN, Pisa)
3/16/11, 10:55 AM
We present recent results on rare B and D decays from the Babar experiment. The focus will be on measurements that are sensitive to the presence of New Physics. Several flavour-changing-neutral-current channels have been investigated: we present results on the CP asymmetry in b -> s gamma, searches for B -> K nu nubar, B -> K tau tau and B0/D0 -> gamma gamma, as well as the branching fraction...
Prof.
Roger JONES
(Lancaster University)
3/16/11, 11:25 AM
The QCD production of Quarkonia and high-PT B-hadrons are important processes as a probe of perturbative QCD. High-PT B-hadrons also form a significant background to many new physics channels at the LHC.
The inclusive production of the J/psi and Upsilon mesons is studied in the dimuon decay mode. The double- differential cross section is measured with respect to the transverse momentum and...
Dr
Wolfgang Altmannshofer
(Fermilab)
3/16/11, 5:00 PM
The SM predictions for CP violating effects in the neutral D meson system are highly suppressed and experimental evidence for sizable CP violation in D0-D0bar mixing would be a clear signal of New Physics. Within supersymmetric scenarios, the popular alignment models can naturally account for large, non-standard effects in D0-D0bar mixing. We show that, within SUSY alignment models, detectable...
Jorge C. Romao
(Instituto Superior Tecnico)
3/16/11, 5:20 PM
We review Lepton Flavour Violation (LFV) in the supersymmetric version of the seesaw mechanism (type I, II and III) and in Left-Right (LR)models. The LFV needed for explaining the neutrino masses and mixings acts as the only source of LFV and has experimental implications both in low-energy experiments (like MEG) where we search for the radiative decays of leptons, and at the LHC where we look...
Dr
Evgueni Goudzovski
(Universite catholique de Louvain)
3/16/11, 5:40 PM
Searches for lepton flavour and lepton number violation in kaon decays by the CERN NA48 and NA62 experiments are reported. A new measurement of the helicity suppressed ratio of charged kaon leptonic decay rates to sub-percent precision at the CERN NA62 experiment is presented. The strong suppression and the high precision of the SM expectation provide a unique sensitivity to deviations from...
Dr
Michele Papucci
(CERN & LBNL)
3/16/11, 6:00 PM
I will briefly present a study of the di-muon CP asymmetry measurement performed by the D0 collaboration. I will focus in particular on its consistency with other CP violation measurements and its possible implications for physics beyond the Standard Model.
Anton Poluektov
(Budker Institute of Nuclear Physics Novosibirsk Russia)
3/16/11, 6:40 PM
Julia Thom
(Cornell University)
3/16/11, 7:10 PM
We report recent B-Physics results from the Tevatron, with special emphasis on B_s mesons. The topics covered include searches for rare flavor-changing neutral-current decays, searches for charm CP violation, CP violation in B0 → J/ψφ and other B decays, and measurements of B decays and properties. The data used for the results described here are based on approximately 2.9− 6.9 fb−1 of data...
Dr
Guillaume MENTION
(CEA Saclay)
3/16/11, 7:30 PM
Recently new reactor antineutrino spectra have been provided for 235U, 239Pu, 241Pu and 238U, increasing the mean flux by about 3 percent. To good approximation, this reevaluation applies to all reactor neutrino experiments. The synthesis of published experiments at reactor-detector distances ≤ 100 m leads to a ratio of observed event rate to predicted rate of 0.979(0.029). With our new flux...
Prof.
Gudrun Hiller
(Dortmund)
3/17/11, 8:30 AM
We present todays and future opportunities of b -> s mu^+ mu^- decays for
testing the Standard Model and explore its borders.
Prof.
Mikhail Danilov
(ITEP)
3/17/11, 8:50 AM
Ordinary
The status and prospects of the SuperKEKB e+e- collider and the BelleII detector are presented. Several examples of physics measurement to be performed with the BelleII at SuperKEKB are discussed.
amarjit soni
(BNL)
3/17/11, 9:10 AM
Dr
Yuehong Xie
(University of Edinburgh)
3/17/11, 9:35 AM
The study of CP violation (CPV) in B decays is a powerful tool to search for new physics beyond the Standard Model. The LHCb experiment will be able to improve the precision of many measurements that have been performed at the B-factories, and make the first high precision studies of CPV in the B_s system. First results will be presented from the 2010 LHC run, and future prospects reviewed."
Dr
Andreas Juettner
(CERN)
3/17/11, 9:55 AM
A number of EW precision tests of the SM depend on non-perturbative QCD-input which can be predicted model-independently by Lattice QCD.
After briefly introducing basic concepts I will present the status of the field. Recent efforts that are aimed at facilitating access to lattice results for the non-specialist will be reviewed. Time permitting, very interesting recent developments will be...
Taku Izubuchi
(Brookhaven National Laboratory Upton, NY USA)
3/17/11, 10:40 AM
Dr
diego martinez santos
(cern)
3/17/11, 11:00 AM
A search for the decays Bs-->mumu and B0--> mumu is performed with about 37 pb-1
of pp collisions at
s-1/2 = 7 TeV collected by the LHCb experiment at the Large Hadron
Collider at CERN. The observed numbers of events are consistent with the background
expectations. The resulting upper limits on the branching ratios are B(Bs-->mumu)
< 43(56) x 10-9 and B(B0 -->mumu) < 12(15) x 10-9 at...
Dr
Joern Kersten
(University of Hamburg)
3/17/11, 11:20 AM
The entropy produced in the decays of super-weakly interacting particles may help to reconcile thermal leptogenesis and Big Bang Nucleosynthesis (BBN) in scenarios with gravitino dark matter, which is usually difficult due to late decays of the next-to-lightest supersymmetric particle (NLSP) spoiling BBN. We study this possibility for a general neutralino NLSP. We discuss the constraints on...
Prof.
Klaus Helbing
(Wuppertal University)
3/17/11, 5:00 PM
IceCube has been completed in December 2010. It forms a lattice of 5160 photomultiplier tubes monitoring a gigaton of the deep Antarctic ice for particle induced photons. The telescope is primarily designed to detect neutrinos with energies greater than 100 GeV from astrophysical sources. Besides this astrophysical motivation IceCube is also a discovery instrument for the search for physics...
Michael Kachelriess
(Department of Physics, NTNU)
3/17/11, 5:40 PM
Combining data from the recently launched Fermi satellite with TeV observations of atmospheric Cherenkov telescopes and low-energy observations has improved our understanding of the sources of high-energy radiation as well as of the conditions in the intergalactic space. After a brief introduction, I show that the non-observation of some TeV blazars in the GeV range by the Fermi satellite lead...
Mrs
Isabelle Lhenry-Yvon
(IPN Orsay)
3/17/11, 6:20 PM
The Pierre Auger Observatory is measuring the ultra-high energy cosmic ray extended air showers with unprecedented sensitivity. Recent results will be reported, including measurements of the spectrum and anisotropies studies at the highest energies. These results will be discussed together with the latest composition estimations from the measurement of the depth of shower maximum by the...
Dr
Toshiyuki Nonaka
(University of Tokyo)
3/17/11, 6:40 PM
The Telescope Array(TA) experiment, located in the western desert of
Utah, USA, at $39.3^{\circ}$ north and $112.9^{\circ}$ west, is designed
for observation of air showers from extreme high energy cosmic rays. The
experiment has a Surface Detector (SD) array surrounded by three
Fluorescence Detectors (FD) to enable simultaneous detection of shower
particles at ground level and...
Mr
Florian Goertz
(Johannes Gutenberg-Universität Mainz)
3/17/11, 7:20 PM
Warped Extra Dimensions provide an elegant solution to both the gauge hierarchy problem and the flavor puzzle of the Standard Model of Particle Physics. The hierarchies between the electroweak and the Planck scale as well as those within the flavor sector are addressed in a five-dimensional setup with non-factorizable geometry.
As the Higgs boson has to reside close to the TeV boundary, it...
Mrs
Jeanette Lorenz
(Fakultaet fuer Physik, LMU Muenchen)
3/17/11, 7:28 PM
First results of the SUSY search in the 1-lepton+jets+ETMiss channel with the ATLAS experiment were made public recently. A precise understanding of the Standard Model backgrounds was crucial for these results. This talk will give a short overview about the Standard Model background estimation techniques and results.
Mr
Marcin Badziak
(University of Warsaw)
3/17/11, 7:36 PM
In simple SO(10) SUSY GUT the top, bottom and tau Yukawa couplings unify at the GUT scale. It is well known that Yukawa unification (YU) consistent with radiative electroweak symmetry breaking requires non-universal scalar masses at the GUT scale. YU prefers also the negative sign of parameter \mu. However, negative \mu is typically disfavoured by the measurements of the muon anomalous...
Sarah Baker
(University College London UK)
3/17/11, 7:44 PM
Mr
Karolos Potamianos
(Purdue University)
3/17/11, 7:52 PM
We present state of the art techniques to effectively reject instrumental backgrounds from searches in the MET+b-jets signature.
Mr
Michele Pinamonti
(INFN Udine & University of Trieste)
3/17/11, 8:00 PM
A measurement of the production cross-section for top quark pairs in pp collisions at sqrt{s} = 7 TeV is presented using data recorded with the ATLAS detector. Events are selected in the lepton+jets topology by requiring a single lepton (electron or muon), large missing transverse energy and at least three jets. No explicit identification of secondary vertices inside jets (b-tagging) is...
Mr
Stefano Perazzini
(Università & INFN Bologna)
3/17/11, 8:16 PM
The LHCb experiment is designed to perform flavour physics measurements at the Large Hadron Collider. Using data collected during the 2010 run, we reconstructed a sample of Hb --> h+h'- decays, where Hb can be either a B0 meson, a Bs0 meson or a Lambda_b baryon, while h and h′ stand for pi, K or p. Such decays are sensitive probes of the Cabibbo-Kobayashi-Maskawa matrix and have the potential...
Mr
ANDREAS GOUDELIS
(DESY - Hamburg)
3/18/11, 8:50 AM
We shall examine the dark matter phenomenology in supersymmetric light higgs boson scenarios, starting from a MSSM variant with non-universal Higgs masses at the GUT-scale. The correct relic density is obtained mostly through the annihilation into a pseudoscalar A. We shall see that most part of the A pole region can produce significant gamma-ray and antiproton signals and comment on the...
Dr
Aaron Manalaysay
(University of Zurich)
3/18/11, 9:10 AM
The field of dark matter direct detection has seen important contributions in recent years from experiments involving liquid noble gases, specifically liquid argon and liquid xenon. These detection media offer many properties deemed useful in this search, including fast scintillation response, charge readout, 3-D position reconstruction, and nuclear recoil discrimination. Part of the very...
Dr
Michel Tytgat
(ULB - Université Libre de Bruxelles)
3/18/11, 9:35 AM
Recently there has been some excitement regarding the possibility of a light dark matter candidate, M sim few GeV. This is mostly related to the DAMA/Libra, and more recently, the CoGeNT results. In this talk I consider possible indirect constraints on such candidates based on the first 11 months Fermi-LAT data. Specifically, I consider the relevance of gamma-rays from galactic dwarf...
Dr
Ana Torrento
(CEA - Saclay)
3/18/11, 9:55 AM
The EDELWEISS-II collaboration has performed a direct search for WIMP dark matter with an array of ten 400 g heat-and-ionization cryogenic detectors equipped with interleaved electrodes for the rejection of near-surface events. Results from eleven months of continuous operation at the Laboratoire Souterrain de Modane will be shown and their interpretation in terms of limits on the...
Dr
C Eric Dahl
(University of Chicago)
3/18/11, 10:35 AM
The COUPP collaboration uses bubble chambers to search for WIMP dark matter. These bubble chambers are sensitive to the ~10 keV nuclear recoils produced by WIMP scattering, but completely insensitive to the gamma and beta backgrounds that limit most dark matter direct detection experiments. Recent developments in acoustic discrimination between nuclear recoils and alpha decays have led to...
Dr
Joachim Kopp
(Fermilab)
3/18/11, 10:55 AM
We analyze LEP monophoton data to set limits on the Dark Matter (DM) production cross section in the process e+e- --> \chi \chi \gamma, where \chi is the DM particle. We then translate these limits into constraints on the DM-nucleon and DM-electron scattering cross sections and on the DM annihilation cross sections. In doing so, we consider different types of DM interactions (scalar, vector,...
Dr
Timur Delahaye
(IFT Madrid)
3/18/11, 11:15 AM
Recent results from direct detection experiments (Dama, CoGeNT, CRESST), though subject to debate, seem to point toward a low mass (few GeV) dark matter (DM) particle. However, low mass DM candidates are not easily achieved in the MSSM nor NMSSM. As shown by some authors, singlet extensions of the MSSM can lead to GeV mass neutralinos and satisfy relic abundance constraints. We propose here to...
Prof.
Laura Covi
(Institute for theoretical physics - Goettingen University)
3/18/11, 5:00 PM
We will review the scenarios of axino or gravitino Dark Matter,
highlight recent theoretical developments and discuss possible
signatures in the SUSY searches at the LHC.
Mr
Yoshizumi Inoue
(University of Tokyo)
3/18/11, 5:25 PM
The axion is a hypothetical particle which was introduced to explain the magical CP conservation in QCD.
The Tokyo axion helioscope aims to detect axions which can be produced in the sun if axions exist. It is equipped with a 2.3m-long 4T superconducting magnet to convert axions into photons, a gas container to hold dispersion-matching medium, a PIN-photodiode-array X-ray detector, and a...
Mr
Torsten Pfoh
(JGU Mainz)
3/18/11, 7:10 PM
In many new physics scenarios, one expects big corrections to the
B_s-\bar B_s mixing amplitude. This gives rise to a new CP-violating phase, which tends to suppress the width difference of the heavy and the light meson state, given that there is no large enhancement of the decay amplitude. I will briefly discuss corretions to the mixing- and the decay amplitude for Randall-Sundrum models...
Ana Maria Rodriguez Sanchez
(UAM Cantoblanco Spain)
3/18/11, 7:18 PM
Laura Gladstone
(University of Wisconsin, Madison)
3/18/11, 7:26 PM
IceCube is the world's largest neutrino telescope, recently
completed at the South Pole. As a proof of pointing accuracy, we look
for the image of the Moon as a deficit in down-going cosmic ray muons,
using techniques similar to those used in IceCube's astronomical
point-source searches.
Mr
Juan Herrero García
(IFIC/UV)
3/18/11, 7:34 PM
We reconsider the possibility that Majorana masses of the three known neutrinos are generated radiatively by the presence of a fourth generation with both Dirac and Majorana masses. We find that the observed light neutrino mass hierarchy is not compatible with the usual experimental tests of the Standard Model in this minimal scenario, but all present data can be accommodated with five...
Mr
Gary Cheng
(Columbia University)
3/18/11, 7:42 PM
The primary motivation for this analysis is to verify the simulation of K+ production from the Booster Neutrino Beam (BNB) line with actual data from the SciBooNE experiment. The BNB line provides neutrinos for current and future experiments. While neutrino flux is predominately due to pion decay, K+ decay is the dominant source above 2 GeV. An accurate understanding of K+ production will...
Mr
Rodrigo Alonso
(IFT & Dto de Física Teórica UAM, Madrid)
3/18/11, 7:50 PM
Minimal Flavour Violation assumes a dynamical origin for the fermion Yukawa couplings. Using only flavour symmetry, we derive the general scalar potential for the fields whose background values are the Yukawa couplings. The minimum of the potential is analyzed and confronted with the physical masses and mixings, discussing the degree of naturalness of the ansatz.
Mr
Sebastien Murphy
(University of Geneva)
3/18/11, 7:58 PM
Among other goals, the NA61/SHINE (SHINE= Sps Heavy Ion and Neutrino Experiment) aims at precise hadron production measurement for improving calculations of the neutrino flux in the T2K neutrino oscillation experiment.
These measurements are performed using a 30 GeV proton beam produced at the SPS with carbon targets of different thickness, including a replica of the T2K target.
Inclusive...
Mr
Enrique Fernandez Martinez
(CERN)
3/19/11, 8:30 AM
We discuss the generation of a dark matter asymmetry via new sphaleron processes associated to an extra non-abelian gauge symmetry common to both the visible and the dark sectors. Such a theory can naturally produce an abundance of asymmetric dark matter which is of the same size as the lepton and baryon asymmetries, as suggested by the similar sizes of the observed baryonic and dark matter...
Dr
Fabiana Cossavella
(Max-Planck-Institut fuer Physik)
3/19/11, 8:50 AM
The Germanium Detector Array (GERDA) experiment searches for
neutrinoless double beta decay of Ge-76, a test of whether
neutrinos are identical with their anti-particles, i.e. of Majorana
type, or distinct from them, i.e. of Dirac type. Neutrinoless double
beta decay could not only establish the charge-conjugation character
of neutrinos, but also place a limit on the effective neutrino...
Mrs
Delphine HARDIN
(Pierre & Marie Curie University, Paris)
3/19/11, 9:15 AM
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...
Prof.
Paul Indelicato
(CNRS)
3/19/11, 9:55 AM
We have obtained a very accurate proton charge distribution radius by measuring the Lamb shift in the 2s level of muonic hydrogen[1]. The value we found, while roughly 10 times more accurate than the one derived from either hydrogen spectroscopy or electron-proton elastic scattering, is 5 standard deviations away. I will show the results of the experiment, the latest theoretical evaluations...
Dr
Zarko Pavlovic
(Los Alamos National Laboratory)
3/19/11, 10:35 AM
This talk will describe recent neutrino oscillation and cross section results from MiniBooNE and SciBooNE experiments.
Alvaro de Rujula
(CERN)
3/19/11, 10:55 AM
Dr
Maxim Libanov
(Institute for Nuclear Research of RAS)
3/19/11, 11:15 AM
Quarks and leptons, the fundamental building blocks of matter, are grouped into three “generations”, that is three sets of particles with identical interactions but hierarchically different masses. The mysterious nature of the charged fermion mass matrix has not been clarified by the evidence for neutrino masses, quite to
the contrary: distinctly different patterns emerge for the quark and...
Dr
Toshinori Mori
(The University of Tokyo)
3/19/11, 11:35 AM
The MEG experiment is searching for the lepton flavor violating decay of a muon, mu+ -> e+ gamma, with a sensitivity that exceeds the previous experiments. Many extensions of the Standard Model, such as Supersymmetric Grand Unified Theories, predict the decay to occure near the current upper limit of the branching ratio. In this talk we present our final, updated result using the 2009 data....
Dr
Michele Pozzato
(Bologna University - INFN)
3/19/11, 5:00 PM
OPERA is a long baseline hybrid experiment located in the Gran Sasso underground laboratory designed to study the nu_mu -> nu_tau neutrino oscillations. OPERA is the first experiment searching for nu_tau appearance from a pure high energy nu_mu beam (CNGS) produced at CERN and travelling a distance of 730 km to the OPERA detector. Tau leptons produced in charged current interactions...
Dr
Mark Hartz
(University of Toronto/York University)
3/19/11, 5:20 PM
T2K is a long baseline high intensity neutrino oscillation experiment employing an off-axis design to search for the as yet unseen appearance of nu_e neutrinos in a nu_mu beam. The neutrino beam originates at the J-PARC facility in Tokai, Japan and the Super-Kamiokande (SK) detector, located 295 km away, measures the composition of the oscillated beam. The SK data is searched for an excess...
Dr
Sanjib Kumar Agarwalla
(IFIC, CSIC and University of Valencia)
3/19/11, 5:40 PM
A stopped pion source provides neutrino beams with energy of a few tens of MeV from pion and muon decay-at-rest. A rich physics program can be accomplished with such a neutrino source. In this talk, I will discuss the role of such a neutrino facility to test LSND and to study CP violation in active neutrinos. I will also mention its applications in
electroweak precision physics and new...
Dr
Pau Novella Garijo
(CIEMAT)
3/19/11, 6:00 PM
The Double Chooz experiment is meant to search for the neutrino mixing angle theta13 taking advantage of the neutrinos generated at the nuclear power plant of Chooz. Double Chooz relies on neutrino flux measurements at two different locations, the so-called far an near detectors, although the first phase runs only with the far detector. The commissioning of the far detector started in January...
Dr
Yusuke Koshio
(LNGS, INFN)
3/19/11, 6:20 PM
The recent solar neutrino measurements in Borexino will be discussed. This presentation will be the first time for newly releasing the results in Borexino.
The first realtime 7Be solar neutrino measurement succeeded in Borexino in 2008. After that, due to the precise detector calibration in 2009, the uncertainty of the 7Be flux measurement will be at 5% level. This result is important, at...
Dr
Gabriel Perdue
(The University of Rochester)
3/19/11, 7:00 PM
MINERvA (Main INjEctoR nu-A) is a new few-GeV neutrino cross section experiment that began taking data in the FNAL NuMI beam-line in the Fall of 2009. MINERvA employs a fine-grained detector capable of complete kinematic characterization of neutrino interactions. We employ a three ton active target region composed of plastic scintillator with additional carbon, iron, and lead targets...
Dr
Mattias Blennow
(Max-Planck-Institut für Physik)
3/19/11, 7:20 PM
We discuss the effects of extra dimensions on the running of neutrino parameters and possible accelerator observables of neutrinos propagating in extra dimensions. Emphasis will be put on determining which patterns of mixing would be viable at the high-energy scale and how a particular neutrino mass model could affect the observability.
Prof.
Mitchell Soderberg
(Syracuse University)
3/19/11, 7:40 PM
The Argon Neutrino Teststand, or ArgoNeuT, project at Fermilab operated a 175 liter Liquid Argon Time Projection Chamber (LArTPC) detector in the NuMI neutrino beam from Sept. 2009 through Feb. 2010. During this time 1.35x10E20 Protons on Target were collected, predominantly in the antineutrino configuration of the NuMI beam. In this talk preliminary attempts to reconstruct and analyze the...
Prof.
Ara Ioannisian
(Yerevan Physics Institute)
3/19/11, 8:00 PM
We calculate the transition radiation process $\nu \to \nu \gamma$ at the border of two different mediums. The neutrinos are taken to be with only standard-model couplings. The medium fulfills the dual purpose of inducing an effective neutrino-photon vertex and of modifying the photon dispersion relation. We find that the probability of transition radiation is larger by three orders of...
Prof.
Chris Quigg
(Fermilab)
3/20/11, 9:00 AM
I offer a brief summary, with commentary, of theoretical contributions to Moriond EW 2011.
