Dr
Michel Guidal
(CNRS/IPN Orsay)
22/07/2010, 09:00
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
Generalized Parton Distributions (GPDs) allow to describe the structure of the nucleon in a very rich and unprecedented way: they contain the correlations between the (transverse) position and (longitudinal) momentum distributions of the partons in the nucleon, they allow to derive the orbital momentum contribution of partons to the nucleon's spin, they provide an access to the nucleon's...
Matteo Cacciari
(LPTHE Paris)
22/07/2010, 09:00
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
Jet algorithms cluster final state particles in high energy collisions with the aim of identifying "jets" that can be considered as proxies of the original hard partons, and therefore allow one to study their production mechanism and subsequent evolution. In heavy ion collisions, this task is severely complicated by the huge underlying event that accompanies the hard one: the particle content...
Dr
Helmut Burkhardt
(CERN)
22/07/2010, 09:00
01 - Early Experience and Results from LHC
Parallel Session Talk
We report on the monitoring and optimization of the beam conditions in early LHC operation :
luminosity monitoring, optimization and calibration, beam-spot size and position and machine induced backgrounds
Pierre Artoisenet
(The Ohio State University)
22/07/2010, 09:00
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
In this talk, I will present recent progress on quarkonium production within NonRelativistic QCD. I will first give a brief introduction of the framework, and discuss the still open questions. I will emphasize the impact of the QCD corrections to several observables, including the pT spectrum and the polarization of J/ψ and Υ states produced in hadron collisions. After comparing up-to-date...
Prof.
Gregory Korchemsky
(CEA Saclay)
22/07/2010, 09:00
12 - Beyond Quantum Field Theory Approaches (including String Theories)
Parallel Session Talk
I will review a recent progress in computing scattering amplitudes in maximally supersymmetric Yang-Mills theory. In addition to the conventional symmetry of the underlying Lagrangian, the scattering amplitudes in this theory exhibit a new, dual superconformal symmetry. This symmetry is powerful enough to completely determine the scattering amplitudes for arbitrary coupling in a suitably defined limit.
Amita Raval
(DESY)
22/07/2010, 09:00
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
A search for events containing an isolated electron or muon and missing transverse momentum produced in e±p collisions is performed with the H1 and ZEUS detectors at HERA. The data were taken in the period 1994-2007 and correspond to an integrated luminosity of 0.98 fb-1. The total single W boson production cross section is measured as 1.06 ± 0.16 (stat.) ± 0.07 (sys.) pb, in agreement with a...
Chaehyun Yu
(KIAS)
22/07/2010, 09:15
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
We study the production of two S-wave heavy quarkona at the LHC in the framework of nonrelativistic QCD. We consider the double quarkonium production of same flavour, J/ψ+J/ψ or Υ+Υ as well as that of different flavour, J/ψ+Υ. We calculate the short-distance coefficients in the colour-octet model completely for the first time. Our results for the differential cross section for the J/ψ+J/ψ or...
Vladimir Chekelian
(MPI fuer Physik)
22/07/2010, 09:15
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
Using the deep inelastic e+p and e-p neutral and charged current scattering cross sections, including data with polarised electron beams, a combined electroweak and QCD analysis is performed. The inclusive single differential cross section d(sigma)/d(Q^2) and the reduced double differential cross section sigma tilde(x,Q^2) are presented for the charged current process, e+/- p -> nu X, in...
Olga Evdokimov
(University of Illinois at Chicago)
22/07/2010, 09:20
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
One of the most remarkable discoveries of the ongoing heavy ion physics program at RHIC is the experimental observation of the jet quenching. The STAR detector, with its extended angular coverage, has made possible novel studies of jet interactions with QCD matter using angular correlations.
Di- and tri-hadron correlation studies have shown evidence of strong interactions between hard partons...
Samuel Wallon
(LPT, Université Paris-Sud, CNRS, Orsay and UPMC Univ. Paris 06)
22/07/2010, 09:20
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
The chiral-odd transversity generalized parton distributions of the nucleon can be accessed experimentally through the exclusive photoproduction process gamma + N -> pi + rho + N', in the kinematics where the meson pair has a large invariant mass and the final nucleon has a small transverse momentum, provided the vector meson is produced in a transversally polarized state. Estimated counting...
Henrik Johansson
(IPhT CEA Saclay)
22/07/2010, 09:22
12 - Beyond Quantum Field Theory Approaches (including String Theories)
Parallel Session Talk
In a previous paper we observed that (classical) tree-level gauge theory amplitudes can be rearranged to display a duality between color and kinematics. Once this is imposed, gravity amplitudes are obtained using two copies of gauge-theory diagram numerators. Here we suggest that this duality persists to all quantum loop orders and can thus be used to obtain multi-loop gravity amplitudes...
Massimiliano Ferro-Luzzi
(CERN)
22/07/2010, 09:25
01 - Early Experience and Results from LHC
Parallel Session Talk
The high resolution of the LHCb vertex detector allows for precise measurements of vertex positions of beam-gas and beam-beam interactions. From these measurements beam parameters such as width and position can be inferred. A novel method will be presented for determining the absolute luminosity at the LHC using these directly measured beam parameters, in combination with beam intensity...
Giovanni Passaleva
(Istituto Nazionale di Fisica Nucleare (INFN) - Florence)
22/07/2010, 09:30
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
Despite large experimental and theoretical efforts, the production rate and polarization of quarkonia states in hadronic collisions is not yet satisfactorily understood. With its first ~10 pb−1 of data, LHCb will be able to provide fresh measurements of the prompt and non-prompt J/ψ production cross sections, at the new center-of-mass energy of 7 TeV and in a unique range of rapidity (3 < y <...
Lech Szymanowski
(Soltan INS, Warsaw)
22/07/2010, 09:30
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
We describe a new way to access the chiral odd transversity parton distribution in the proton through the photoproduction of lepton pairs. The basic ingredient is the interference of the usual Bethe Heitler or Drell-Yan amplitudes with the amplitude of a process, where the photon couples to quarks through its chiral-odd distribution amplitude, which is normalized to the magnetic susceptibility...
Terry Wyatt
(University of Manchester)
22/07/2010, 09:30
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
We present results of W and Z boson studies at the Tevatron including Drell-Yan cross sections measurement, W boson charge asymmetry, Z/gamma forward-backward asymmetry as well as transverse momentum distribution.
Dr
Valery The CLAS Collaboration
(Jefferson Lab)
22/07/2010, 09:40
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
Deeply Virtual Exclusive Reactions with CLAS
Deeply virtual exclusive reactions offer an unique opportunity to study the structure of the nucleon at the parton level as one varies both the size of the probe, i.e. the photon virtuality Q^2, and the momentum transfer to the nucleon t. Such processes can reveal much more information about the structure of the nucleon than either inclusive...
Chris Pinkenburg
(BNL)
22/07/2010, 09:40
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
Jets from heavy ion collisions provide a measurement of the medium-induced parton energy loss and the in-medium fragmentation properties, and therefore can significantly enhance our understanding of the energy loss mechanism and medium property. The medium modification effects are determined by comparing to a p+p baseline measurement. However the presence of high multiplicity backgrounds in...
Pierre Vanhove
(IPHT CEA/Saclay & IHES)
22/07/2010, 09:44
12 - Beyond Quantum Field Theory Approaches (including String Theories)
Parallel Session Talk
We show that different color-ordered tree-level amplitudes in gauge theories satisfy monodromy relations. These relations imply the existence of minimal basis of amplitude and provide the numerator factors of the amplitude for a parametrisation of the tree-level amplitude using only cubic vertices. Applications to supergravity amplitudes follow straightforwardly through the KLT-relations....
Nuno Leonardo
(Purdue)
22/07/2010, 09:45
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
We present the first measurements of the J/ψ and Υ production cross sections in proton-proton collisions at 7 TeV, as measured by the CMS experiment using the dimuon decay channel. For the J/ψ we give the inclusive and the prompt differential cross sections, versus transverse momentum, as well as the beauty fraction, statistically separating the two contributions through a fit to the lifetime...
John Baines
(Particle Physics-Rutherford Appleton Laboratory-STFC - Science &)
22/07/2010, 09:45
01 - Early Experience and Results from LHC
Parallel Session Talk
The ATLAS trigger has been used very successfully to collect collision data during 2009 and 2010 LHC running at centre of mass energies of 900 GeV, 2.36 TeV, and 7 TeV. The trigger system reduces the event rate, from the design bunch‐crossing rate of 40 MHz, to an average recording rate of 200Hz. The ATLAS trigger is composed of three levels. The first (Level 1) uses custom electronics to...
Laurent Serin
(Laboratoire de l''Accelerateur Lineaire (LAL) (IN2P3) (LAL))
22/07/2010, 09:50
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
The first measurement of the production cross-sections for W and Z bosons in proton-proton interactions at sqrt(s) = 7 TeV are reported from the ATLAS experiment. Based on its excellent capability for reconstructing both high pT electrons and muons, the electron and the muon decay modes of the W/Z bosons are compared. First results for the ratio of W/Z production and of W+/W- production will...
Dr
Igor Anikin
(Joint Inst. for Nuclear Research)
22/07/2010, 10:00
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
We study a deeply virtual Compton scattering off a spin-one particle, as the case for coherent scattering on a deuteron target. We discuss the role of twist three contributions for restoring the gauge invariance of the amplitude corresponding to this process. We consider both kinematical and dynamical sources of twist three generalized parton distributions. The role of the QCD equations of...
Jan Rak
(BNL)
22/07/2010, 10:00
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
In the first LHC 2009 and 2010 runs ALICE experiment collected about 10 nb-1 at √s=900 GeV and 10 μb-1 at √s=7 TeV of minimum bias p + p events. I will present a first look at the hard scattering phenomena exploring high-pT leading charged hadron correlations. An azimuthal and pseudorapidity correlations are analyzed in order to extract the mean transverse fragmentation momentum <jT> and...
Edgar Fernando Carrera Jarrin
(Boston University-Unknown-Unknown)
22/07/2010, 10:00
01 - Early Experience and Results from LHC
Parallel Session Talk
The CMS trigger system has been designed to cope with unprecedented luminosities and accelerator bunch-crossing rates of up to 40 MHz at LHC. The High-Level-Trigger (HLT) combines in a novel way the traditional L2 and L3 trigger components which are implemented in a commercial Filter Farm with thousands of CPUs. The flexibility of a contiguous software environment allows the coherent tuning of...
Dr
Giuseppe Bruno
(University and INFN, Bari, Italy)
22/07/2010, 10:00
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
In this Conference contribution, we summarize the status of the ongoing analysis on J/ψ production at central rapidity in pp collisions at sqrt(s)=7 TeV and show the first results. We also give perspectives on the first quarkonium measurements at central rapidity in Pb-Pb collisions which are scheduled by the end of this year.
Slava Rychkov
(ENS & Jussieu)
22/07/2010, 10:06
12 - Beyond Quantum Field Theory Approaches (including String Theories)
Parallel Session Talk
A classic result of 4D CFT says that, in a unitary theory, a scalar operator of dimension d=1 is free. We will present results showing in which sense a scalar O of dimension d>1 but close to 1 is "nearly free". Namely, we analyze the OPE OxO of such a scalar with itself and show that 1) there must be a scalar of dimension 2+O(sqrt(d-1)) in this OPE; 2) in the d->1 limit, no scalars of...
Prof.
Jeremiah Mans
(University of Minnesota/CMS)
22/07/2010, 10:10
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
The production of W and Z bosons has been observed in pp collisions at a center-of-mass energy of 7 TeV using data collected in the CMS experiment. W events were selected containing an isolated, energetic electron or muon. The presence of an energetic neutrino is demonstrated using the distribution of missing transverse energy (MET), which is calculated from calorimetric and tracking...
Joseph Michael Izen
(University of Texas at Dallas)
22/07/2010, 10:15
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
A search for charmonium and other new states is performed in a study of exclusive initial-state-radiation production of Ds+Ds-, Ds*+Ds-, and Ds*+Ds*- events from electron-positron annihilations at a center-of-mass energy of 10.58 GeV. The data sample corresponds to an integrated luminosity of 525 fb-1 recorded by the BaBar experiment at the PEP-II storage ring. We also study the decay width...
Eric Van Herwijnen
(CERN)
22/07/2010, 10:15
01 - Early Experience and Results from LHC
Parallel Session Talk
The Large Hadron Collider beauty experiment (LHCb) is a dedicated heavy flavour physics experiment at the LHC. The trigger system employs the finite lifetime and relative large mass of charm and beauty hadrons to distinguish heavy flavour and background from inelastic pp-scattering. The LHCb trigger is a two level system. The first level is implemented in hardware, it reduces the visible...
Prof.
Chaden Djalali
(University of South Carolina)
22/07/2010, 10:15
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
The theory of the strong interaction, Quantum Chromodynamics (QCD), has been remarkably successful in describing high-energy and short-distance-scale experiments involving quarks and gluons. However, applying QCD to low energy and large-distance scale experiments has been a major challenge. Chiral symmetry is one of the most fundamental symmetries in QCD and provides guiding principles to deal...
Prof.
Eduardo Fraga
(Instituto de Fisica, Universidade Federal do Rio de Janeiro)
22/07/2010, 10:15
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
The structure of the phase diagram for strong interactions becomes richer in the presence of a magnetic background, which enters as a new control parameter for the thermodynamics, and can exhibit new phases and interesting features. Motivated by the relevance of this physical setting for current and future high-energy heavy ion collision experiments and for the cosmological QCD transitions, we...
Dr
Jean-Philippe Lansberg
(Ecole polytechnique)
22/07/2010, 11:00
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
We discuss the potentialities offered by the study of backward exclusive processes in the scaling regime, i.e. involving a large Q2 photon and a baryonic exchange in the t-channel. We introduce the concept of Transition Distribution Amplitudes (TDAs) containing unique information on the hadron structure, then discuss how they enter the description of processes such as backward...
Daniel Kikola
(Lawrence Berkeley Nat. Lab./Warsaw Univ. of Technology)
22/07/2010, 11:00
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
According to lattice QCD calculation, the suppression pattern of quarkonia states is expected to provide insight into thermodynamic properties of hot and dense matter, Quark-Gluon Plasma (QGP), predicted to be created in relativistic heavy ions collisions at RHIC energies. The suppression in this calculation is caused by screening of the binding potential between quark and antiquark in QGP. ...
Steven Lowette
(UCSB)
22/07/2010, 11:00
01 - Early Experience and Results from LHC
Parallel Session Talk
The CMS tracker is the largest silicon detector ever built, covering an area close to 200 m2 and consisting of 15 148 silicon strip and 1440 silicon pixel modules. The use of tracker data in physics analysis requires fine-grained monitoring and calibration procedures. Results from timing studies, threshold optimization, calibration of gains and Lorentz angle determination are shown and the...
Dr
Nick Halmagyi
(CEA)
22/07/2010, 11:00
12 - Beyond Quantum Field Theory Approaches (including String Theories)
Parallel Session Talk
Constructing models of meta-stable vacua in supersymmetric theories is a crucial task for string phenomenology. It has been conjectured that anti-D3 branes in the Klebanov-Strassler background indeed produce such a supersymmetry breaking scenario. In this talk I will outline the results of a supergravity calculation which represents the backreaction of such anti-D3 branes and discuss the...
Prof.
Matthias Steinhauser
(KIT)
22/07/2010, 11:00
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
The three-loop corrections to the static potential between a quark and its anti-quark are considered. It constitutes a building block for a number of physical observables connected to heavy quarks. We describe the evaluation of the occurring integrals and discuss the phenomenological implications.
Peter Uwer
(Humboldt-Universität zu Berlin)
22/07/2010, 11:00
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
We review recent theoretical progress concerning top-quark pair production at the Tevatron and LHC. In particular we present updated theoretical predictions taken into account the newest pdf's. Furthermore we comment on the possibility of a direct measurement of the running top-quark mass.
LI Gang
(IHEP)
22/07/2010, 11:15
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
We present the measurements of charmonium P-wave spin-singlet state h_c made with 106M ψ' events collected by BESIII at BEPCII. Clear signals are observed for ψ'->π0 h_c with and without the subsequent radiative decay h_c->γ η_c. First measurements of the absolute branching ratios Br(ψ'->π0 h_c) = (8.4 ± 1.3 ± 1.0)*10-4 and Br(h_c->γ η_c) = (54.3 ± 6.7 ± 5.2)% are also presented. A...
Alexei Prokudin
(University of Turin)
22/07/2010, 11:15
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
The structure of the proton is described from the point of view of transverse momentum dependent distributions of partons. Complete set of functions describing the structure of the proton at leading twist is defined. TMDs can be studied experimentally in polarised inclusive processes such as Semi Inclusive Deep Inelastic Scattering.Factorization of Semi Inclusive Deep Inelastic Scattering and...
Dr
Antonio Limosani
(University of Melbourne)
22/07/2010, 11:18
01 - Early Experience and Results from LHC
Parallel Session Talk
ATLAS is a multipurpose experiment which records the products of the LHC collisions. To reconstruct trajectories of charged particles produced in these collisions, the experiment is equipped with large-scale tracking systems built of silicon planar sensors (pixel and strip-based), as well as a drift‐tube based detector system. This talk will cover the first experience gained with these...
Alex Linden-Levy
(LLNL)
22/07/2010, 11:20
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
Over the last ten years the PHENIX experiment has continued to increase the amount of recorded and analyzed data available for p+p, d+Au and A+A colliding species at various energies. These data have allowed us to analyze J/ψ mesons in all three collision types which contributes to the understanding of J/ψ formation, suppression in cold nuclear matter and anomolous suppression in heavy ion...
Breese Quinn
(University of Mississippi)
22/07/2010, 11:22
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
Using events containing an isolated lepton and missing transverse energy, together with jets originating from the fragmentation of b quarks, we measure the cross section of single top quark production. Measurements of the t-channel and s-channel, matrix element Vtb and search for Flavor Changing Neutral Currents are also performed.
John Estes
(ENS)
22/07/2010, 11:22
12 - Beyond Quantum Field Theory Approaches (including String Theories)
Parallel Session Talk
In a string theory framework, one may unambiguously compute the free-energy density including the vacuum energy, in backgrounds with spontaneously broken supersymmetry. For certain classes of models, the resulting backreaction induces a cosmological evolution which mimics a radiation dominated expansion. The supersymmetry breaking scale is attracted to the temperature scaleand the internal...
Ronggang Ping
(IHEP)
22/07/2010, 11:30
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
With the high luminosity of electron-positron storage ring at BEPCII and excellent performance of the BESIII spectrometer, BESIII accumulated about 100 million ψ(2S) data. With the help of these high statistics and high quality data, the radiative decays of ψ(2S) into light meson P(P = π0, η, η'), and χcJ radiative decays to vector meson V (V = ρ, ω, φ) , together with χcJ decays into...
Francesco Hautmann
(Institute of Theoretical Physics)
22/07/2010, 11:35
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
This talk gives an introduction to transverse momentum dependent (unintegrated) parton distributions and presents the results of a recent study of quark splitting functions defined at fixed longitudinal and transverse momenta. We discuss the treatment of endpoint divergences, emphasizing the physical picture that underlies the need for infrared subtraction factors in the operator matrix...
Silvia Borghi
(University of Glasgow)
22/07/2010, 11:36
01 - Early Experience and Results from LHC
Parallel Session Talk
The LHCb detector is a forward spectrometer. Its tracking system consists of silicon strip detectors and straw tube drift chambers. The LHCb experiment is dedicated to the reconstruction of B decays into many particle final states. For a high B reconstruction efficiency a high efficient track reconstruction is crucial. We will report on the performance of the individual tracking subdetectors...
Dr
Javier Castillo Castellanos
(Service de Physique Nucleaire (SPhN))
22/07/2010, 11:40
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
ALICE is the LHC experiment dedicated to the study of heavy-ion collisions. The main purpose of ALICE is to investigate the properties of a state of deconfined nuclear matter, the Quark Gluon Plasma. Heavy flavour measurements will play a crucial role in this investigation. The physics programme of ALICE has started by studying proton-proton collisions at unprecedented high energies.
We will...
Prof.
Michela Petrini
(CNRS/LPTHE)
22/07/2010, 11:44
12 - Beyond Quantum Field Theory Approaches (including String Theories)
Parallel Session Talk
We discuss supersymmetry breaking compactifications in type IIA and we propose a new treatment of non-supersymmetric sources: for space-time filling supersymmetric branes, the energy density is minimized by a pullback of a special form given by a pure spinor. We propose to extremise the combined bulk-brane energy density by replacing the DBI action by a pullback of a polyform from the bulk,...
Fabrizio Margaroli
(Purdue)
22/07/2010, 11:45
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
We present precision measurements of the top quark pair production cross sections in ppbar collisions at a center of mass energy of sqrt(s)=1.96 TeV in up to 5 fb-1 of data as well as results of study of kinematics distributions of top quark pairs produced.
Korneliy Todyshev
(BINP)
22/07/2010, 11:45
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
We present a measurement of the mass, total width and leptonic width of the ψ(3770) meson. Results were obtained using data collected at the ψ(3770) resonance with the KEDR detector at the electron-positron accelerator complex VEPP-4M.
The commonly used fitting procedure does not contain interference ψ(3770) resonance and non-resonant DDbar cross section.
In our analysis we used a...
Prof.
Klaus The HERMES Collaboration
(University of Erlangen)
22/07/2010, 11:50
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
Recent Results on Deeply Virtual Compton Scattering at HERMES
Deeply Virtual Compton Scattering is an elegant tool to investigate the angular momenta of partons inside the nucleon. Using longitudinally polarized electron and positron beams, HERMES has studied this process using various gaseous targets, in either unpolarized or longitudinal as well as transverse polarization states. This...
Johanna Fleckner
(CERN / University of Mainz)
22/07/2010, 11:54
01 - Early Experience and Results from LHC
Parallel Session Talk
First 7 TeV proton-proton collisions produced by the Large Hadron Collider at CERN have been recorded by the ATLAS experiments in 2010. The ability to accurately and efficiently reconstruct the trajectories of charged particles produced in these collisions is a critical component in the measurements that will be presented at this conference. This talk will present results on the performance of...
Leonid Gladilin
(Moscow State University)
22/07/2010, 12:00
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
Studies of the long-lived resonances Ks and Lambda, reconstructed in inelastic collisions at 900 GeV and 7 TeV using a minimum bias trigger, have been performed using the ATLAS inner tracking detector. The spectra for these resonances are measured as a function of their transverse momentum and rapidity, and compared with Monte Carlo models. The ratio of anti-Lambda to Lambda production is...
Bryan Fulsom
(SLAC National Accelerator Laboratory)
22/07/2010, 12:00
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
We present recent results on quarkonium states from the Babar experiment. We have observed the Y(^3 1 D_J) state of bottomonium in the reaction Y(3S)->γ γ Y(^3 1D_J), γ(^3 1 D_J)->π π Y(1S) with a significance of 6.2 standard deviations.
We present a study of the decay Y(1S)->D+* + X produced in the decay Y(2S)->π+ π- Y(1S) using a sample of 98.6 million Y(2S) events. We measure the...
Dr
Aurelien Barrau
(LPSC Laboratoire de Physique Subatomique et de Cosmologie (LPSC))
22/07/2010, 12:06
12 - Beyond Quantum Field Theory Approaches (including String Theories)
Parallel Session Talk
Loop quantum gravity is, together with string theory, one on the major candidate approach to quantize gravity. It provides a framework which allows for a non-perturbative and background-independant canonical quantization of general relativity. In this talk, I will briefly go through the basic conceptual groundings of the theory and switch to the latests developments associated with its...
Prof.
Nikolaos Kidonakis
(Kennesaw State University)
22/07/2010, 12:08
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
I present the latest theoretical developments in the calculation of the cross section for top-antitop pair production and single top quark production via all main partonic channels. Higher-order corrections from resummation of soft gluons are added through NNLL accuracy. Detailed numerical results are presented for the cross section and transverse momentum distributions at the Tevatron and LHC...
Dr
Fabienne The COMPASS Collaboration
(CEA Saclay)
22/07/2010, 12:10
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
Recent results on the nucleon spin structure from COMPASS
COMPASS is a multi-purpose fixed target experiment at the CERN Super Proton Synchrotron, dedicated to the study of the spin and the structure of the nucleon. From 2002 to 2011, high statistics data for polarized inclusive and semi-inclusive deep inelastic scattering were collected using 160 GeV/c polarized muons on polarized deuteron...
Boris Mangano
(UCSD)
22/07/2010, 12:12
01 - Early Experience and Results from LHC
Parallel Session Talk
First 7 TeV proton-proton collisions produced by the Large Hadron Collider at CERN have been recorded by the CMS experiment in 2010. The ability to accurately and efficiently reconstruct the trajectories of charged particles produced in these collisions is a critical component for most measurements at the LHC. We present several methods for determining the efficiency and measuring the...
Dr
Tome Anticic
(Rudjer Boskovic Institute)
22/07/2010, 12:15
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
New data on the production of hyperons, as well as of pions, charged kaons, protons, anti-protons, neutrons in p+p interactions are presented. The data come from a sample of 8.2 million inelastic events obtained with the NA49 detector at the CERN SPS at 158 GeV/c beam momentum. The high statistics data sample allows the extraction of detailed differential distributions as a function of x_f ,y...
Dr
Jean-Philippe Lansberg
(Ecole polytechnique)
22/07/2010, 12:15
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
I will discuss the impact of QCD corrections (up to alpha_s^5) to quarkonium production at high energies and the introduction of new observables meant to better discriminate between the different mechanisms at work in quarkonium production at the LHC.
Prof.
Erik Verlinde
(ITP, University of Amsterdam)
22/07/2010, 14:00
12 - Beyond Quantum Field Theory Approaches (including String Theories)
Parallel Session Talk
Starting from first principles and general assumptions Newton's law of gravitation is shown to arise naturally and unavoidably in a theory in which space is emergent through a holographic scenario. Gravity is explained as an entropic force caused by changes in the information associated with the positions of material bodies. A relativistic generalization of the presented arguments directly...
Juan Pablo Fernandez
(CIEMAT)
22/07/2010, 14:00
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
We report new, world-leading measurements of b-hadron lifetimes and their ratios using B+->J/ψ K+ , B0->J/ψ K0*, B0->J/ψ K0s and Λb->J/ψ Λ, decays reconstructed in a data sample corresponding to 4.3 fb-1 collected by the CDF experiment. A detailed resolution model provides improved systematic uncertainties on the lifetimes, and determination of the b hadron decay-length using only the J/ψ...
Andrew Powell
(University of Oxford)
22/07/2010, 14:00
01 - Early Experience and Results from LHC
Parallel Session Talk
Particle identification (PID) is a fundamental requirement for LHCb and is provided by CALO, MUON and RICH sub-detectors. The Calorimeters provide identification of electrons, photons and hadrons in addition to the measurement of their energies and positions. As well as being part of the LHCb trigger, the MUON system provides identification of muons to a very high level of purity, essential...
Dr
Javier Albacete
(IPhT-CEA-Saclay)
22/07/2010, 14:00
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
The Color Glass Condensate is the effective theory of QCD for high energy scattering. The recent theoretical progress achieved through the calculation of next-to-leading order corrections to the small-x renormalization group equations has opened up a period for precision CGC phenomenology. I shall present CGC analyses of experimental data for the inclusive structure functions in...
Dmitri Nikolenko
(Budker Institute for Nuclear Physics)
22/07/2010, 14:00
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
We report the experiment on a precise comparison of (e+ p) and (e- p) scattering cross sections, which gives a direct experimental evidence for the two-photon exchange (TPE) contribution in this reaction. Such data are in demand now, because they, most likely, may explain the dramatic disagreement of proton electromagnetic form factors measurements in the polarization transfer (PT) experiments...
Dr
Tobias Kasprzik
(KIT, Karlsruhe)
22/07/2010, 14:00
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
The investigation of weak bosons (W^+/W^-,Z) produced with associated hard QCD jets will be of great phenomenological interest at the LHC, since such processes constitute an important background to a large variety of BSM-physics signatures. At the same time - owing to their large production cross sections and the clear decay signatures of the vector bosons - they can be used to monitor and...
Olga Norniella
(UIUC)
22/07/2010, 14:15
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
We present new measurements of suppressed decays of the B0s meson to J/ψ final states at CDF. Using a data sample corresponding to an integrated luminosity of 5 fb-1 of proton-antiproton collisions at sqrt(s)=1.96 TeV, we utilize a low transverse-momentum dimuon trigger to acquire a large sample of J/ψ->µ+µ- decays. We form fully reconstructed B0s candidates using information from the...
Prof.
Stefano Forte
(Milan University)
22/07/2010, 14:15
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
I review the current status of knowledge of the parton distributions (PDF) of the nucleon, with particular emphasis on recent progress on the determination of PDF uncertainties and on theoretical and phenomneological issues which limit the current PDF accuracy. I then discuss the implications of PDF uncertainties on LHC processes, with specific references to standard candles and Higgs production.
Philippe Gras
(DAPNIA)
22/07/2010, 14:20
01 - Early Experience and Results from LHC
Parallel Session Talk
We present results on the commissioning and performance of the CMS electromagnetic and hadron calorimeters in pp collisions at a centre of mass energy of 7 TeV at the LHC. The first LHC beams have been used to finalize the commissioning of the readouts and triggers. The calibrations and synchronisations of the calorimeters using cosmic muons, beam splash events (where the LHC beam is targeted...
Dr
Hannu Paukkunen
(University of Santiago de Compostela)
22/07/2010, 14:20
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
The recent global analyses of the nuclear parton distribution functions lend support to the validity of the factorization theorem of QCD in high-energy processes involving bound nucleons. With special attention on the recent global analysis EPS09, we review the latest developements in the domain of nuclear PDFs.
Joseph Haley
(FNAL)
22/07/2010, 14:22
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
We present results of the WZ production cross section measurement and W mass measurement in electron channel with the DZero detector at sqrt(s) = 1.96 TeV.
Jean Wicht
(KEK)
22/07/2010, 14:30
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
We present a measurement of the branching fraction for the CP eigenstate decay Bs->J/ψ f0(980). The result is based on 23.6 fb-1 of data collected at the Y(5S) resonance with the Belle detector at the KEKB asymmetric e+e- collider. We have also searched for Bs0->hh decays, where h stands for a charged or neutral kaon, or a charged pion. We observe the decay Bs0->K+K- and measure its branching...
Dr
Pedro Jimenez-Delgado
(University of Zürich)
22/07/2010, 14:35
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
Utilizing recent DIS measurements (σ_r, F_{2,3,L}) and data on hadronic dilepton production we determine at NNLO (3-loop) of QCD the dynamical parton distributions of the nucleon generated radiatively from valence-like positive input distributions at an optimally chosen low resolution scale (Q_0^2 < 1 GeV^2) by employing the ``fixed flavor number factorization scheme'' (FFNS). These are...
Dr
Cyrille Marquet
(Theory Division - CERN)
22/07/2010, 14:40
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
The STAR collaboration has recently measured the azimuthal correlation function of forward di-pions. The data show a disapearance of the away-side peak in central d+Au collisions, compared to p+p collisions. We argue that this effect, absent at mid-rapidity, is a consequence of the small-x evolution into the saturation regime of the Gold nucleus wave function, and we show that the data can be...
Pascal Pralavorio
(Faculte des Sciences de Luminy-Centre de Physique des Particules)
22/07/2010, 14:40
01 - Early Experience and Results from LHC
Parallel Session Talk
The commissioning, operation and general performance of the electromagnetic and hadronic calorimeters of ATLAS will be presented, as achieved using random triggers, calibration data, cosmic muons, and LHC proton-proton collisions. Methods will be presented for verifying the precision of inter-channel synchronization and calibration, and their improvement with in-situ data.
Ashoke Sen
(Harish-Chandra Research Institute)
22/07/2010, 14:42
12 - Beyond Quantum Field Theory Approaches (including String Theories)
Parallel Session Talk
In this talk we shall describe how quantum entropy function formalism allows us to compute classical, perturbative and non perturbative contribution to the extremal black hole entropy. We shall also compare the results with microscopic results.
viviana cavaliere
(INFN Pisa)
22/07/2010, 14:42
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
We present studies of the WW and WZ production cross sections with CDF II detector from p-pbar collisions at sqrt(s) = 1.96 TeV in different final states.
Ms
Sevda Esen
(University of Cincinnati)
22/07/2010, 14:45
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
The large data sample being recorded with the Belle detector at the Y(5S) energy provides a unique opportunity to study the poorly-known Bs meson decays. Following our recent measurement of Bs->Ds π in a sample of 23.6 fb-1, we extend the analysis to include decays with photons in the final state. Using the same sample, we report the first observation of three other dominant exclusive Bs...
Dr
Michal Sumbera
(Nuclear Physics Institute ASCR-Acad. of Sciences of the Czech Re)
22/07/2010, 14:55
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
We analyze several reactions on nuclear targets at forward rapidities and different energies (at smallest experimentally accessible Bjorken x). Nuclear effects are usually interpreted as a result of shadowing or the Color Glass Condensate. QCD factorization of soft and hard interactions requires the nucleus to be an universal filter for different Fock components of the projectile hadron. We...
Scott Snyder
(Brookhaven National Laboratory (BNL))
22/07/2010, 15:00
01 - Early Experience and Results from LHC
Parallel Session Talk
The understanding of the reconstruction of electrons in the ATLAS experiment at LHC is one of the key issues for the 2010 run at a center of mass energy of 7 TeV. Two aspects are of interest: the energy calibration and the reconstruction efficiency. The energy measurement of electrons is based on the electromagnetic calorimeter over most of the relevant energy range (5 GeV to a few TeV). The...
Vincent Poireau
(LAPP CNRS)
22/07/2010, 15:00
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
We present a measurement of the branching fractions of the 22 decay channels B0 and B+ to Dbar^(*) D^(*) K, where Dbar^(*) and D^(*) are fully reconstructed. The B0 and B+ mesons are reconstructed in a sample of hadronic events for all the possible Dbar D K modes, namely B0 -> D^(*)- D^(*)0 K^+, D^(*)-D^(*)+ K^0, Dbar^(*)0 D^(*)0 K0 and B^+ -> Dbar^(*)0 D^(*)+ K0, Dbar^(*)0 D^(*)0 K+, D^(*)-...
Prof.
Thomas Phillips
(Duke University)
22/07/2010, 15:02
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
Studies of di-boson production including production of ZZ and Zg production and updated stringent limits on triple gauge boson couplings will be presented. The ZZ sample is used also to search for gg → H → ZZ to constrain fourth generation fermion models.
Dr
Sheer El-Showk
(CEA Saclay)
22/07/2010, 15:03
12 - Beyond Quantum Field Theory Approaches (including String Theories)
Parallel Session Talk
We quantize a family of smooth multicentered supergravity solutions generating (micro)states of a large supersymmetric black hole in five dimensions. Certain special states are found to suffer from unexpected, macroscopically large quantum fluctuations in the near horizon region of the putative black hole. This breakdown in effective field theory near the horizon may be relevant in resolving...
Dr
Ronan McNulty
(UNIVERSITY COLLEGE DUBLIN)
22/07/2010, 15:05
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
We summarise the results from early LHCb data for muon final states produced through the Drell-Yan process via W, Z and gamma* down to a Q2 of 10 GeV2. Extrapolating these results up to the sample sizes expected in the remainder of the 2010 run gives exciting prospects for parton density function studies, which will benefit from LHCb’s unique ability to trigger on low momentum objects. Due to...
Andrei Rostovtsev
(ITEP Institute for Theoretical and Experimental Physics (ITEP)-U)
22/07/2010, 15:10
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
Inclusive non-diffractive photoproduction of ρ(770)º, K*(892)º and φ(1020) mesons is investigated with the H1 detector in ep collisions at HERA. The corresponding average gamma p centre-of-mass energy is 210 GeV. The mesons are measured in the transverse momentum range 0.5 < pT < 7 GeV and the rapidity range |y_lab|<1. Differential cross sections are presented as a function of transverse...
Thomas Hartmann
(University of Rostock)
22/07/2010, 15:15
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
In a sample of 467 million BBbar pairs collected with the BaBar detector at the PEP-II collider at SLAC we have observed the decay B0bar->Λc+ pbar π0 and measured its branching fraction. We determine an upper limit for the branching fraction of the decay B0bar->Λc+(2455) pbar and observe an enhancement at the threshold of the invariant mass of the baryon-antibaryon pair.
We also report the...
Dr
Hannu Paukkunen
(University of Santiago de Compostela)
22/07/2010, 15:20
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
We study the nuclear effects in the neutrino\antineutrino-nucleon deep inelastic scattering (DIS) by comapring the NuTeV, CDHSW, and CHORUS cross-sections from Iron and Lead targets to the predictions derived from the latest parton distribution functions (PDFs). The nuclear modifications found seem to display agreement with those in charged lepton DIS. Our study thus lends support to the...
Salerno Roberto
(LLR-Ecole Polytechnique)
22/07/2010, 15:20
01 - Early Experience and Results from LHC
Parallel Session Talk
The performance of electron and photon reconstruction and identification has been studied at √s = 7 TeV. Reconstruction and identification variables as well as isolation and photon conversion rejection variables, in the case of electrons, have been compared between data and Monte Carlo for signal and background. Electron and photon identification efficiency, electron fake rate and photon...
Dr
Martin Schnabl
(Institute of Physics AS CR, Prague)
22/07/2010, 15:24
12 - Beyond Quantum Field Theory Approaches (including String Theories)
Parallel Session Talk
We review recent progress in finding and analyzing classical solutions of open string field theory.
Robi Peschanski
(IPhT, CEA-Saclay)
22/07/2010, 15:25
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
We consider and compare various geometric-scaling solutions of the QCD Balitsky-Kovchegov (BK) equation, for fixed or running QCD coupling.
These solutions predict different scaling variables which we first test with recent DIS cross-section data using the "Quality Factor" method. Then we use a chi^2 method to compare the different predicted parametrisations of the traveling wave...
Dr
David South
(DESY)
22/07/2010, 15:25
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
Events with at least two high transverse momentum leptons (electrons or muons) are studied using the H1 and ZEUS detectors at HERA. Seven di- and tri-lepton events are observed in e+p collision data with a scalar sum of the lepton transverse momenta above 100 GeV, while 1.94 +- 0.17 events are expected. Such events are not observed in e-p collisions for which 1.19 +- 0.12 are predicted. A...
Massimo Corradi
(INFN, Sezione di Bologna)
22/07/2010, 15:35
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
Combination of F2^cc from DIS measurements at HERA
The charm contribution F2^cc to the proton structure function F2 is determined. The results of D meson production cross section measurements are combined with the measurements using semi-leptonic decays into muons as well as inclusive track measurements. The correlations of the systematic uncertainties between different measurements are taken...
Voica Ana Maria Radescu
(Deutsches Elektronen Synchrotron (DESY))
22/07/2010, 16:15
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
Combined Measurement of Neutral and Charged Current Cross Sections at HERA
A combination is presented of the inclusive cross sections measured by the H1 and ZEUS Collaborations in neutral and charged current deep-inelastic ep scattering at HERA. The combination uses data from unpolarised ep scattering taken during the HERA-I phase as well as measurements with longitudinally polarised electron...
Prof.
Dmitri Melikhov
(HEPHY & SINP)
22/07/2010, 16:15
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
We study the decay constants of D, Ds, B, Bs mesons with Borel QCD sum rules, making use of the recent modifications related to the Borel-parameter-dependent effective continuum threshold. For the fixed values of the QCD parameters, our modifications are shown to lead to a visible shift of the extracted value of the decay constant compared to the standard analysis based on a...
Mr
Julien Baglio
(Theoretical Physics Laboratory, Orsay)
22/07/2010, 16:15
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
I will present an update of the theoretical predictions for the production cross sections of the Standard Model Higgs boson at the Tevatron collider. The two main search channels will be discussed, the gluon-gluon fusion mechanism gg → H and the Higgs-strahlung process q qbar → VH with V=W/Z, including all relevant higher order QCD and electroweak corrections in perturbation theory. A thorough...
Prof.
Kostas Skenderis
(University of Amsterdam)
22/07/2010, 16:15
12 - Beyond Quantum Field Theory Approaches (including String Theories)
Parallel Session Talk
There has been a lot of interest in recent times in systems with non-relativistic conformal symmetry, such as the Schroedinger symmetry. Such systems appear in condensed matter physics such as, for example, fermions at unitarity. Here we discuss how to set up holography for bulk systems with Schroedinger symmetry.
Frank Krauss
(Durham)
22/07/2010, 16:15
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
In this talk Monte Carlo models for Minimum Bias physics and their corresponding tunes will be confronted with data from the LHC.
Anthony Morley
(CERN)
22/07/2010, 16:15
01 - Early Experience and Results from LHC
Parallel Session Talk
With the start of the LHC operations at at center of mass energy of 7 TeV a large sample of low energy photons, mostly coming from the decay of neutral mesons, have been collected with the ATLAS detector. Due to the large amount of material upstream the electromagnetic (EM) calorimeter, about 50% of these photons will convert before reaching it. The converted photons are used as a tool to map...
Dr
Nicolas Garron
(University of Edinburgh)
22/07/2010, 16:30
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
We present our strategy to compute the b-quark mass and the heavy-strange decay constant, in heavy quark effective theory including 1/m corrections. By matching the effective theory and QCD in a small volume, one can determine non-perturbatively the bare parameters of the HQET Lagrangian and those of the heavy-light currents. The static, kinetic and magnetic energy of the heavy-light meson...
Dr
Paul Thompson
(University of Birmingham)
22/07/2010, 16:35
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
Measurement of the Charm and Beauty Structure Functions using the H1 Vertex Detector at HERA
Inclusive charm and beauty cross sections are measured in e^- p and e^+p neutral current collisions at HERA in the kinematic region of photon virtuality 5 < Q^2 < 2000 GeV^2 and Bjorken scaling variable 0.0002 < x < 0.05. The data were collected with the H1 detector in the years 2006 and 2007...
Ariel Schwartzman
(SLAC National Accelerator Laboratory)
22/07/2010, 16:35
01 - Early Experience and Results from LHC
Parallel Session Talk
This talk presents the first results on jet, missing transverse energy (MET) and tau reconstruction performance, as obtained with the ATLAS detector in 7 TeV proton-proton collisions at the LHC. Jets are reconstructed with the anti-kt jet algorithm using calorimeter clusters, or as so called 'track jets' using the Inner Detector only. The performance of the jet reconstruction will be compared...
Dr
Mercedes Lopez Noriega
(IPNO)
22/07/2010, 16:40
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
We will present the transverse momentum spectra of identified particles measured with the ALICE experiment in proton-proton collisions at LHC recorded at the center-of-mass energies of 0.9 and 7 TeV. The spectra of the charged particles (π± , K± , p and pbar) were obtained measuring the dE/dx in the ALICE TPC and ITS complemented at higher momenta by the time-of-flight information provided by...
Yoshikazu Nagai
(FNAL)
22/07/2010, 16:40
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
We have searched for the Standard Model Higgs boson in the low mass region using CDF detector at the Tevatron. Results with over 5 fb-1 of integrated luminosity will be presented.
Leonard Lesniak
(H. Niewodniczanski Institute of Nuclear Physics PAN, Krakow, Poland)
22/07/2010, 16:45
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
The two-pion effective mass and helicity angle distributions in the charged B-meson decays into three charged pions are studied. The weak decay amplitudes are calculated in the QCD factorization framework. The final state interactions between the produced pairs of pions are described using strong pion-pion scalar and vector form factors. The scalar form factors are constrained by ...
Dr
Vasilis Niarchos
(University of Crete and Ecole Polytechnique)
22/07/2010, 16:45
12 - Beyond Quantum Field Theory Approaches (including String Theories)
Parallel Session Talk
D-branes with a U-shaped geometry, like the D8 flavor branes in the Sakai-Sugimoto model of QCD, are encountered frequently in holographic backgrounds. We argue that the commonly used DBI action is inadequate as an effective field theory description of these branes, and discuss an effective action that incorporates naturally the non-local physics of a complex scalar mode. Our results are...
Markus Juengst
(Universitaet Bonn)
22/07/2010, 16:55
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
Measurement of the photoproduction of b-quarks at threshold at HERA
The cross section of bb_bar photoproduction in ep collisions is measured with the H1 detector at HERA. Events containing b-quarks are identified through detection of two low momentum electrons in the final state. Semileptonic decays bb_bar -> ee X are exploited in the kinematic range of the photon virtuality Q^2 < 1 GeV^2,...
Joanna Weng
(CERN)
22/07/2010, 16:55
01 - Early Experience and Results from LHC
Parallel Session Talk
Data from pp collisions have been used to study jets and missing transverse energy (MET) in the CMS experiment at the Large Hadron Collider. Results are presented for four different approaches to reconstruct jets and three different approaches to reconstruct MET in The CMS detector: calorimeter-only based jet and MET reconstruction; an algorithm which improves the measurement of calorimeter...
Keith Ulmer
(University of Colorado)
22/07/2010, 17:00
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
We report on measurements of hadron production in pp collisions at √s = 0.9, 2.36 and 7 TeV, recorded with the CMS detector. Transverse momentum, pseudorapidity and multiplicity distributions of charged hadrons are presented. For non-single diffractive collisions, the average charged-hadron transverse momentum and pseudorapidity density near mid-rapidity are compared with other measurements in...
Dr
Igor Gorelov
(Univ. of New Mexico, USA.)
22/07/2010, 17:00
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
We present a high statistics study of Σb bottom baryon states based on a sample corresponding to 5.3 fb-1 of fully reconstructed Λb decays collected by the CDF experiment. The first independent mass and widths measurements of all four states Σb*+ and Σb*- are reported.
Yuji Enari
(LPNHE Paris Universtat VI&VII)
22/07/2010, 17:00
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
We have searched for the Standard Model Higgs boson in the low mass region using DZero detector at the Tevatron. Results with over 6 fb-1 of integrated luminosity will be presented.
Dr
James Sparks
(University of Oxford)
22/07/2010, 17:06
12 - Beyond Quantum Field Theory Approaches (including String Theories)
Parallel Session Talk
I will summarize recent progress in constructing M-theory/string theory duals to (2+1)-dimensional superconformal field theories.
Andreas Werner Jung
(DESY)
22/07/2010, 17:15
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
Measurement of the D* Meson Production Cross Section and F_2^ccbar, at High Q^2, in ep Scattering at HERA
The inclusive production of D*(2010) mesons in deep-inelastic ep scattering is measured in the kinematic region of photon virtuality 100 < Q^2 < 1000 GeV^2 and inelasticity 0.02 < y < 0.7. Single and double differential cross sections for inclusive D* meson production are measured in the...
Lea Michaela Caminada
(Institut fuer Teilchenphysik - ETHZ)
22/07/2010, 17:15
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
Measurements by the CMS experiment of the cross section for inclusive b production in proton-proton collisions at sqrt(s) = 7 TeV are presented. The measurements are based on different methods, such as inclusive jet measurements with secondary vertex tagging or selecting a sample of events containing jets and at least one muon, where the transverse momentum of the muon with respect to the...
Dr
Florian Beaudette
(CERN)
22/07/2010, 17:15
01 - Early Experience and Results from LHC
Parallel Session Talk
The aim of the CMS particle flow event-reconstruction algorithm is to identify and reconstruct individually each particle arising from the LHC proton-proton collision, by combining the information from all subdetectors. The resulting particle-flow event reconstruction leads to an improved performance for the reconstruction of jets and MET, and for the identification of electrons, muons, and...
Alison Lister
(University of Geneva)
22/07/2010, 17:20
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
The measurement of the properties of proton-proton interactions at center-of-mass energies ranging from 900 GeV (injection energy) to 7 TeV in the ATLAS detector are presented. The charged-particle density, its dependence on transverse momentum and pseudo-rapidity, and the relationship between transverse momentum and charged-particle multiplicity are measured for events with at least one...
Dr
Donatella Lucchesi
(INFN Padova)
22/07/2010, 17:20
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
We have searched for the Standard Model Higgs boson in the high mass region using CDF detector at the Tevatron. Results with over 5 fb-1 of integrated luminosity will be presented.
Dr
Samuel Wallon
(CNRS/LPT Orsay)
22/07/2010, 17:27
12 - Beyond Quantum Field Theory Approaches (including String Theories)
Parallel Session Talk
We study the doubly virtual Compton scattering off a spinless target gamma* P -> gamma* P' within the Anti-de Sitter(AdS)/QCD formalism. We find that the general structure allowed by the Lorentz invariance and gauge invariance of the Compton amplitude is not easily reproduced with the standard recipes of the AdS/QCD correspondence. In the soft-photon regime, where the semi-classical...
Philipp Roloff
(DESY)
22/07/2010, 17:30
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
Measurement of D+- and D0 Production in Deep Inelastic Scattering Using a Lifetime Tag at HERA
The production of D+- and D0 mesons has been measured with the ZEUS detector at HERA using an integrated luminosity of 133.6 pb-1. The measurements cover the kinematic range 5 < Q2 < 1000 GeV2, 0.02 < y < 0.7, 1.5 < pT(D) < 15 GeV and |eta(D)| < 1.6. Combinatorial background to the D meson signals...
Achim Geiser
(Fachbereich Physik)
22/07/2010, 17:30
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
Beauty photoproduction in dijet events has been measured at HERA with the ZEUS detector using an integrated luminosity of 126 pb-1. Beauty was identified in events with a muon in the final state by using the transverse momentum of the muon relative to the closest jet. Lifetime information from the silicon vertex detector was also used; the impact parameter of the muon with respect to the...
Giovanni Petrucciani
(Univ. of California, San Diego)
22/07/2010, 17:35
01 - Early Experience and Results from LHC
Parallel Session Talk
The performance of muon reconstruction in CMS has been studied on a sample of muons collected in pp collisions at √s = 7 TeV at the LHC. Measured distributions of basic muon-track quantities are well reproduced by the Monte Carlo simulation. Efficiencies of various high-level trigger, identification, and reconstruction algorithms have been measured and compared with the expectations from Monte...
Dr
Stefano Lacaprara
(INFN Padova)
22/07/2010, 17:40
08 - Heavy Ion Collisions and Soft Physics at Hadron Colliders
Parallel Session Talk
We present results on two-particle angular correlations in proton-proton collisions over a broad range of pseudorapidity (Δη) and azimuthal angle (Δφ). The data were collected with the CMS detector. A complex two-dimensional correlation structure in Δη and Δφ is observed. In the context of an independent cluster model of short-range correlations, the cluster size and its decay width are...
Boris Tuchming
(CEA Saclay)
22/07/2010, 17:40
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
We have searched for the Standard Model Higgs boson in the high mass region using DZero detector at the Tevatron. Results with up to 7 fb-1 of integrated luminosity will be presented.
Bennie Ward
(Baylor University, Waco, TX, USA)
22/07/2010, 17:43
12 - Beyond Quantum Field Theory Approaches (including String Theories)
Parallel Session Talk
In Weinberg’s asymptotic safety approach to quantum gravity, one has a finite dimensional critical surface for a UV stable fixed point to generate a theory of quantum gravity with a finite number of physical parameters. The task is to demonstrate how this fixed point behavior actually arises. We argue that, in a recently formulated extension of Feynman’s original formulation of the theory,...
Dr
Magno Machado
(Universidade Federal do Rio Grande do Sul)
22/07/2010, 17:45
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
The exclusive processes in electron-proton (ep) interactions are an important tool to investigate the QCD dynamics at high energies as they are in general driven by the gluon content of proton which is strongly subject to parton saturation effects. In this paper we compute the cross sections for the exclusive vector meson production as well as the deeply virtual Compton scattering (DVCS)...
Martin Woudstra
(University of Massachusetts)
22/07/2010, 17:55
01 - Early Experience and Results from LHC
Parallel Session Talk
The large cosmic data samples collected in fall 2009 by the ATLAS experiment have been used to study the performance of the Muon Spectrometer. Detailed studies of the basic Muon spectrometer performance in terms of sagitta resolution, tracking efficiency and momentum resolution are presented and provide an update with respect to the results recently published. The results are also compared...
Dr
Christopher Gorham Lester
(University of Cambridge)
23/07/2010, 09:00
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
We review the methods which have been proposed for measuring masses of new particles at the Large Hadron Collider paying particular attention to the kinematical techniques suitable for extracting mass information when invisible particles are expected. This talk is, in effect, a companion to a recent review with the same title: http://arxiv.org/abs/1004.2732 (Barr & Lester)
Daniel Traynor
(Queen Mary, Univ. of London)
23/07/2010, 09:00
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
Transverse Momentum of Charged Particles at low Q^2 at HERA
The electron-proton collider HERA allows deep-inelastic scattering (DIS) at very small Bjorken-x of about 10^-5. At such small x new parton dynamics beyond DGLAP are expected to become important. Charged particle spectra are measured in DIS (Q^2 > 5 GeV^2), in different regions of pseudorapidity, using the increased statistics of...
Francesco Cafagna
(Univ. + INFN)
23/07/2010, 09:00
01 - Early Experience and Results from LHC
Parallel Session Talk
Totem is the only LHC experiment that will explore the forward region at pseudorapidity larger than 3.1. The main goal is the measurement of the total and elastic cross-section at 14 TeV and the study of diffractive physics in the forward region. The experiment approved and funded in the 2006, was build, largely commissioned and started his data taking in December 2009. The total cross...
Stefan Schaefer
(Humboldt University Berlin)
23/07/2010, 09:00
09 - Progress in Lattice Techniques and New Results
Parallel Session Talk
Ab-initio studies of the physics of pions using lattice QCD have become possible over the last decade, where particular attention was given to the computation of the constants of the chiral Lagrangian. This is due to significant progress in algorithms, which now allow simulations with light sea quarks on fine lattices. This talk has two objectives: the first is to introduce the ideas behind...
Frank Krauss
(University of Durham)
23/07/2010, 09:00
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
The status of the standard multi-purpose Monte Carlo tools for LHC physics is reviewed, with a special emphasis on recent developments. These include the systematic inclusion of higher-order corrections and the modelling of soft QCD.
Matthias Neubert
(Mainz University)
23/07/2010, 09:00
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
Precision Predictions for Top-Quark Pair Production at Hadron Colliders
Content
Precision predictions for phenomenologically interesting observables such as the t-tbar invariant mass distribution and forward-backward asymmetry in top-quark pair production at hadron colliders require control over the differential cross section in perturbative QCD. We improve existing calculations of the...
Dr
Hiroaki Watanabe
(KEK)
23/07/2010, 09:00
J-PARC-E14 KOTO experiment aims at first observation of the rare decay KL->pi0nunu using an intense KL beam in the Hadron experimental hall at J-PARC. The new dedicated KL beamline for KOTO experiment has been constructed in 2009. First KL beam was successfully extracted and surveyed from Oct. in 2009 to Feb. in 2010. Assembling of main detector part, which is composed of 2716 CsI crystals,...
Alessia Tricomi
(Dipartimento di Fisica)
23/07/2010, 09:15
01 - Early Experience and Results from LHC
Parallel Session Talk
The LHCf detector is the smallest of the six experiments which are taking data at the CERN LHC accelerator. The whole detector has been installed at the beginning of 2008 on both sides of LHC collision point 1 (IP1). LHCf has been designed to measure with high accuracy energy and transverse momentum spectra of neutral particles in the very forward region (η > 8.4) of LHC collisions by means of...
Leszek Zawiejski
(Institute of Nuclear Physics PAN)
23/07/2010, 09:15
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
Inclusive Photoproduction of rho^0, K^{*0} and phi Mesons at HERA
Inclusive non-diffractive photoproduction of rho(770)^0, K^*(892)^0 and phi(1020) mesons is investigated with the H1 detector in ep collisions at HERA. The corresponding average gamma p centre-of-mass energy is 210 GeV. The mesons are measured in the transverse momentum range 0.5 < p_T < 7 GeV and the rapidity range...
Andreas Winhart
(Institut fur Physik)
23/07/2010, 09:15
Measurement of the helicity suppressed ratio of charged kaon leptonic decay rates BR(K -> e nu)/BR(K -> mu nu) has long been considered as an excellent test of lepton universality and the Standard Model (SM) description of weak interactions. It was realised recently that the suppression of the SM contribution might enhance the sensitivity to SUSY-induced effects to an experimentally...
Mr
Viatcheslav Sharyy
(CEA-Saclay)
23/07/2010, 09:20
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
Studies of top quark properties, including spin correlations, W boson helicity, forward backward asymmetry, Wtb coupling as well as search for anomalous top quark couplings with the D0 detector will be presented.
Didar Dobur
(University of Florida)
23/07/2010, 09:25
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
Searches for supersymmetry (SUSY) and other phenomena beyond the standard model involve a broad range of signatures with jets, leptons, photons, and missing transverse momentum (MET). These searches require careful control over backgrounds from standard model processes. We present the current understanding of these issues both in SUSY searches and in other beyond-the-standard-model searches...
Dr
Ryu Sawada
(The University of Tokyo)
23/07/2010, 09:30
A lepton flavor violating rare muon decay mu -> e gamma is forbidden in the standard model. On the other hand, new theories, such as supersymmetric grand-unification theory etc, predict the branching ratio in the range of 10^{-14}-10^{-12}, which is just below the current experimental upper bound (1.2x10^{-11}) set by a previous experiment. MEG experiment is designed to search for the decay...
Olaf Behnke
(DESY)
23/07/2010, 09:30
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
Study of Charm Fragmentation into D^{*+-} Mesons in Deep-Inelastic Scattering at HERA
The process of charm quark fragmentation is studied using D^{*+-} meson production in deep-inelastic scattering as measured by the H1 detector at HERA. Two different regions of phase space are investigated defined by the presence or absence of a jet containing the D^{*+-} meson in the event. The parameters...
Iouri BELIKOV
(IPHC, CNRS-IN2P3)
23/07/2010, 09:30
01 - Early Experience and Results from LHC
Parallel Session Talk
ALICE is the LHC experiment dedicated to the study of heavy-ion collisions. The main purpose of ALICE is to investigate the properties of a state of deconfined nuclear matter, the Quark Gluon Plasma. Heavy flavour measurements will play a crucial role in this investigation. The physics programme of ALICE has started by studying proton-proton collisions at unprecedented high energies. We will...
Frank Siegert
(IPPP Durham and UC London)
23/07/2010, 09:30
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
Multi-jet merging of matrix elements and parton showers in Monte-Carlo event generators has become a crucial tool for LHC predictions. An existing algorithm for tree-level matrix elements is extended to full NLO accuracy.
Takashi Kaneko
(KEK)
23/07/2010, 09:35
09 - Progress in Lattice Techniques and New Results
Parallel Session Talk
Disconnected diagrams give crucial contributions to the physics of flavor singlet hadrons and to scalar form factors of non-singlet hadrons. Lattice calculation of the disconnected diagrams is not straightforward because naively it requires huge number of fermion matrix inversions. In this talk, we present recent progress with improved simulation methods particularly focusing on the...
Chris Blanks
(Imperial College)
23/07/2010, 09:45
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
Prompt K0_s production in pp collisions at the LHCb experiment
The inclusive production of prompt K0_s mesons, which are either produced directly in the fragmentation process or in the decay chain of prompt resonances decaying strongly or electromagnetically, has been studied with the very first data collected in pp collisions at sqrt(s) = 0.9 TeV using the LHCb detector in December 2009....
Kiyoshi Hayasaka
(Nagoya Univ.)
23/07/2010, 09:45
We present the results of a search for lepton flavor violation (LFV) in tau --> lepton (e or mu) + pseudoscalar (pi0, eta or eta') and in tau --> lepton (e or mu) + a vector meson (rho, omega, phi, K^{*0}, anti-{K}^{*0}) decays using a large data sample accumulated with the Belle detector at the KEKB symmetric-energy e^+e^- collider. The sensitivity to these modes is significantly improved...
Andrew Eppig
(University of Michigan)
23/07/2010, 09:45
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
Studies of top quark properties, including spin correlations, W polarization and forward backward asymmetry at the Tevatron's CDF detector will be presented as well as results of searches for light Higgs boson in top quark decays.
Lorenzo Basso
(Rutherford Appleton Laboratory - STFC)
23/07/2010, 09:45
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
We present the Large Hadron Collider (LHC) discovery potential in the Z' sector of a U(1)_{B-L} enlarged Standard Model (that also includes three heavy Majorana neutrinos and an additional Higgs boson) for sqrt{s}=7 and 14 TeV centre-of-mass (CM) energies, considering both the Z'_{B-L} -> e+e- and Z'_{B-L} -> µ+µ- decay channels.
The run of the LHC at sqrt{s}=7 TeV, assuming at most ∫L ~ 1...
Aleksander Kusina
(Institute of Nuclear Physics PAN)
23/07/2010, 09:50
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
We would like to present recent work, which is going to change three-decades old paradigm of perturbative QCD calculations, in which hard process matrix element calculated to LO+NLO(+NNLO) level is combined with: either the collinear PDF at LO+NLO(+NNLO) or with the Monte Carlo parton shower, but the MC PS restricted to LO only! For many years upgrading Monte Carlo parton shower to NLO level...
Sheldon STONE
(Syracuse)
23/07/2010, 10:00
01 - Early Experience and Results from LHC
Parallel Session Talk
The LHCb experiment is primarily designed to study charm and bottom hadron decays at the LHC. The first exclusively reconstructed charm and bottom hadrons signals have been observed shortly after the start of the first LHC physics run at √s = 7 TeV, in events collected with a minimum bias trigger. Charm cross-sections for D0, D+, Ds and Lambda_c are measured in the forward region covered by...
Dr
Dru Renner
(DESY, Zeuthen)
23/07/2010, 10:00
09 - Progress in Lattice Techniques and New Results
Parallel Session Talk
The nonperturbative calculation of the hadronic contributions to the anomalous magnetic moment of the muon is an interesting challenge for QCD, especially in light of the continuing discrepancy between the Standard Model prediction and experimental measurements. We have calculated the leading order hadronic contribution using lattice QCD with pion masses ranging from 600 MeV down to 300 MeV....
Prof.
Bernd The STAR Collaboration
(MIT)
23/07/2010, 10:00
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
The RHIC spin physics program has in 2009 completed the first data taking period of polarized p+p collisions at sqrt{s}=500 GeV. This opens a new era in the study of the spin-flavor structure of the proton based on the production of W^-(+) bosons. W^-(+) bosons are produced in ubar+d,(dbar+u) collisions and can be detected through their leptonic decays, e^- + νbar_e;(e^+ +ν_e), where only the...
Dr
Dominique Fortin
(TRIUMF)
23/07/2010, 10:05
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
The Standard Model predicts relatively low backgrounds to processes with high-pt leptons, and photons making them strong candidates for early discoveries. We present the results of the most sensitive such searches based on first data collected with the ATLAS detector at the LHC.
Dr
Pedro Ruiz-Femenia
(RWTH Aachen University)
23/07/2010, 10:10
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
We analyse subleading electroweak effects in the top anti-top resonance production region in e+ e- collisions which arise due to the decay of the top and anti-top quarks into the W+ W- b bbar final state. These are NLO corrections adopting the non-relativistic power counting v ~ alpha_s ~ sqrt(alpha_EW). In contrast to the QCD corrections which have been calculated (almost) up to NNNLO, the...
Prof.
Bennie Ward
(Baylor University)
23/07/2010, 10:10
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
By implementing the new IR-improved Dokshitzer-Gribov-Lipatov-Altarelli-Parisi-Callan-Symanzik (DGLAP-CS) kernels recently developed by one of us in the HERWIG6.5 environment we generate a new MC, HERWIRI1.0(31), for hadron-hadron scattering at high energies. We use MC data to illustrate the comparison between the parton shower generated by the standard DGLAP-CS kernels and that generated by...
Alberto Lusiani
(Dipartimento di Fisica)
23/07/2010, 10:15
We report on a variety of results involving decays of the tau lepton using the very large sample of tau+tau- pairs produced in e+e- annihilation data collected with the BaBar detector at the PEP-II asymmetric-energy B Factory near a center-of-mass energy of 10.58 GeV. From measurements of the ratios of branching fractions: B(tau -> mu nu nubar) / B(tau -> e nu nubar), B(tau -> pi nu) / B(tau...
Dr
John The PHENIX Collaboration
(Brookhaven National Laboratory)
23/07/2010, 10:15
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
Electrons from W^± decays have been observed in longitudinally polarized p+p collisions at sqrt{s} = 500 GeV in the PHENIX detector at RHIC. The electron energy spectrum from W decays measured with an integrated luminosity of approximately 10 pb^-1 will be shown. A measurement of the electron single spin asymmetry which measures the spin structure of flavor identified quarks and antiquarks in...
Julie Kirk
(RAL)
23/07/2010, 11:00
01 - Early Experience and Results from LHC
Parallel Session Talk
This talk will give an overview on first results on QCD, quarkonia, and heavy-flavour physics in proton-proton collisions at √s=7 TeV, recorded with the ATLAS experiment at the LHC. The QCD measurements address properties of both soft and hard collisions, such as the underlying event, particle production in minimum bias events and jet production. First results from quarkonia and heavy flavour...
Alexander Grohsjean
(Ludwig-Maximilians-Univ. Muenchen)
23/07/2010, 11:00
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
We report a set of measurements of the top quark mass obtained from proton-antiproton collisions at a center-of-mass energy of 1.96 TeV at the Fermilab Tevatron with the DZero detector using different decay modes and analysis methods. We present measurements of the top quark width, and mass difference between the top and anti-top quark as well.
Dr
tim coughlin
(university college london)
23/07/2010, 11:00
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
We investigate the theoretical description of the central exclusive production process. Taking Higgs production as an example, we sum logarithmically enhanced corrections appearing in the perturbation series to all orders in the strong coupling. In addition, we perform a fixed order calculation of the corrections relevant for the Sudakov factor appearing in the process. Both approaches agree...
Prof.
Paul Harrison
(University of Warwick)
23/07/2010, 11:00
We construct a new set of Standard Model evolution invariants which link quark masses and mixing parameters. We examine their phenomenological implications and infer a simple combination of Yukawa coupling matrices which appears to play a unique role in the Standard Model. This suggests a possible new insight into the observed spectrum of quark masses. Similar evolution invariants are obtained...
Prof.
Ted Barnes
(ORNL)
23/07/2010, 11:00
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
In this introductory overview I will discuss recent developments in hadron spectroscopy that are of particular relevance to this meeting, including the spectroscopy of heavy quark hadrons, exotic and multiquark systems, and new theoretical results such as developments in LQCD.
Mr
Nhan Viet Tran
(Rowland Dept. of Phys. and Astron.-Johns Hopkins University)
23/07/2010, 11:00
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
We present techniques and analysis tools to study the production and decay of a single resonance produced at the LHC. In a model-independent way, we show how to perform analysis of the resonance decay products to ascertain the spin of the resonance, its parity and production mechanism, and its general couplings to Standard Model matter and gauge fields. Examples of spin-zero, -one, and -two...
Owe Philipsen
23/07/2010, 11:00
09 - Progress in Lattice Techniques and New Results
Parallel Session Talk
The QCD phase diagram as a function of temperature and chemical potential for baryon number is largely unknown. Straightforward Monte Carlo simulations of lattice QCD are prohibited by the so-called sign problem for systems with a non-vanishing net baryon number. After a brief introduction to the origin of the sign problem, I review some recent computational techniques valid for sufficiently...
Dr
De Nardo Guglielmo
(Napoli University and INFN)
23/07/2010, 11:15
We present a search for the fully leptonic B decay B+ -> tau+ nu_{tau} in 459M B/anti-B pairs collected at the Upsilon(4S) resonance using the BaBar detector. We select a sample of events with a reconstructed hadronic B decay, B- -> D0 X-, where X represents a combination of charged and neutral light mesons; in the remainder of each event we search for the B+ -> tau+ nu_{tau} signal.
Dr
Edmond Berger
(ANL)
23/07/2010, 11:15
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
We explore the potential for discovery of an exotic color sextet scalar in same sign top quark pair production in early running at the LHC. We present the first phenomenological analysis at collider energies of a color sextet scalar with full top quark spin correlations included. We demonstrate that one can measure the scalar mass, the top quark polarization, and confirm the scalar resonance...
Armen Bunyatyan
(DESY)
23/07/2010, 11:20
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
Diffractive cross sections of electroproduction of rho and phi mesons is measured at HERA with the H1 detector in the elastic and proton dissociative channels. The data correspond to an integrated luminosity of 51 pb^-1. Based on data collected with the H1 detector at HERA in 2005, cross sections or elastic rho photoproduction have been measured at momentum transfer |t| < 0.58 GeV^2 and...
Paolo Gauzzi
(Universita di Roma I "La Sapienza")
23/07/2010, 11:20
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
KLOE results on light meson spectroscopy
The KLOE experiment has collected 2.5 fb-1 at the peak of the phi resonance at the e+e- collider DAPHNE in Frascati. The whole data set includes 100 million eta's produced through the radiative decay phi --> eta gamma and tagged by means of the monochromatic recoil photon. With this sample, we are studying eta rare decays. We have a final result for...
Sara Bolognesi
(CERN)
23/07/2010, 11:25
01 - Early Experience and Results from LHC
Parallel Session Talk
This talk will give an overview on first results on QCD, quarkonia, and heavy-flavour physics in proton-proton collisions at √s=7 TeV, recorded with the CMS experiment at the LHC. The QCD measurements address properties of both soft and hard collisions, such as the underlying event, particle production in minimum bias events and jet production. First results from quarkonia and heavy flavour...
Hyunsu Lee
(University of Chicago)
23/07/2010, 11:25
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
We report a measurement of the top quark mass obtained from proton-antiproton collisions at a center-of-mass energy of 1.96 TeV at the Fermilab Tevatron using the CDF II detector using different decay modes and analysis methods. We present measurements of the top quark width, and mass difference between the top and anti-top quark in the lepton+jets channel as well.
Jacek Stypuła
(H. Niewodniczański Institute of Nuclear Physics Kraków)
23/07/2010, 11:28
We present a measurement of the decay B --> tau nu in a large data sample recorded with the Belle detector at the KEKB asymmetric energy e^+ e^- collider. We obtain the branching fraction for B --> tau nu and present a direct determination of the product of the B meson decay constant f_B and the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element |V_{ub}|. The resulting constraints on a...
Jim Brooke
(H.H. Wills Physics Laboratory)
23/07/2010, 11:30
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
We report the preliminary results of searches for long-lived particles produced in 7 TeV pp collisions from CERN’s Large Hadron Collider. A signature-based search for heavy stable charged particles using a high transverse-momentum muon trigger was performed. The search uses time-of-flight and ionization energy loss to isolate slowly moving, heavy, high transverse momentum particles. This...
George Fleming
(Yale University)
23/07/2010, 11:35
09 - Progress in Lattice Techniques and New Results
Parallel Session Talk
One of the important missions of LHC is to probe the mechanism behind the electroweak symmetry breaking through which elementary particles, such as the W and Z gauge bosons and the quarks, acquire mass. While the most economical solution is to have the Standard Model Higgs mechanism, other possibilities exist. One such possibility is to have dynamical electroweak symmetry breaking (DEWSB) as a...
Vladimir Kekelidze
(Joint Institute for Nuclear Research (JINR))
23/07/2010, 11:40
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
Precision Measurement of pi pi Scattering Lengths in Ke4 Decays at NA48
The measurement of the S-wave pi pi scattering lengths is a fundamental test of the validity of Chiral Perturbation Theory. We report on the final NA48/2 result, which uses the complete NA48/2 data set with more than a million reconstructed Ke4 decays. From these events we have determined the decay form factors and pi pi...
marko staric
(J. Stefan Institute, Ljubljana, Slovenia)
23/07/2010, 11:45
We search for the flavor-changing neutral current decays D0 --> mu^+ mu^- and D0 --> e^+e^-, and for the lepton-flavor violating decays D0 --> e^(+-) mu^(-+) using a large data sample collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. We find no evidence for any of these decays. We obtain significantly improved upper limits on the branching fractions: BR(D0...
Lech Szymanowski
(Soltan INS, Warsaw)
23/07/2010, 11:50
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
We describe a consistent approach to factorization of scattering amplitudes for exclusive processes beyond the leading twist approximation. The method is based on the Taylor expansion of the scattering amplitude in the momentum space around the dominant light-cone direction and thus naturally introduces an appropriate set of non-perturbative correlators which encode effects not only of the...
Dr
Pasquale-Fabrizio Salvatore
(University of Sussex)
23/07/2010, 11:50
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
Exotic heavy long-lived particles are predicted in a range of theories which extend the Standard Model. Supersymmetry models alone allow for meta-stable sleptons, squarks and gauginos. Such particles are identifiable as they traverse the detecter by observables related to tracking, timing and energy loss which differ for Standard Model and exotic processes. Also, if a model such as...
Tim Christiansen
(CERN)
23/07/2010, 11:50
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
The top quark is a fundamental building block of the standard model. Due to the large cross section, top-antitop pairs will be copiously produced in high energy proton-proton collisions at the Large Hadron Collider (LHC). We present the first results of a selection of top-quark pair production events in the dilepton channel, where both W-bosons from the top quarks decay leptonically into...
Maria Cepeda
(CIEMAT (Madrid))
23/07/2010, 11:50
01 - Early Experience and Results from LHC
Parallel Session Talk
The production of W and Z bosons has been observed in pp collisions at a center-of-mass energy of 7 TeV using data collected in the CMS experiment. W events were selected containing an isolated, energetic electron or muon. The presence of an energetic neutrino is demonstrated using the distribution of missing transverse energy (MET), which is calculated from calorimetric and tracking...
Frank Nerling
(Fakultaet fuer Physik)
23/07/2010, 12:00
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
The COMPASS experiment focused its physics program on hadron spectroscopy in the last two years. As a fixed target experiment at the CERN SPS accelerator, COMPASS features large acceptance and high momentum resolution and thus qualifies well for studies of diffractive dissociation and central production. Hadron formation with both 190 GeV pi-/K- amd 190 GeV p/pi+ beams on liquid hydrogen,...
390.
Effects of a potential fourth fermion generation on the upper and lower Higgs boson mass bounds
Dr
Philipp Gerhold
(Humboldt-University Berlin)
23/07/2010, 12:05
09 - Progress in Lattice Techniques and New Results
Parallel Session Talk
We study the effect of a potential fourth fermion generation on the upper and lower Higgs boson mass bounds. This investigation is based on the numerical evaluation of a chirally invariant lattice Higgs-Yukawa model emulating the same Higgs-fermion coupling structure as in the Higgs sector of the electroweak Standard Model. In particular, the considered model obeys a Ginsparg-Wilson version of...
Royon Christophe
(DAPNIA)
23/07/2010, 12:10
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
After a brief description of the models of exclusive diffractive Higgs prodution, we first evaluate the theoretical uncertainties that affect the calculation of exclusive cross section (jets, Higgs...). In addition, in view of the recent measurement of exclusive dijet at CDF and the new implementation of the corresponding cross section in FPMC (Forward Physics Monte-Carlo), we developed an...
Dr
Jan Kretzschmar
(University of Liverpool)
23/07/2010, 12:10
01 - Early Experience and Results from LHC
Parallel Session Talk
This talk will give an overview on first results on W and Z production in proton-proton collisions at √s=7 TeV, recorded with the ATLAS experiment at the LHC. The selection of W and Z events will be described, together with data-driven methods used to estimate the trigger and reconstruction efficiencies, as well as the main backgrounds. The W and Z signal yields and the extracted cross...
Prof.
Keisho HIDAKA
(Tokyo Gakugei University)
23/07/2010, 12:10
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
We study gluino decays, and squark production and decays, in the Minimal Supersymmetric Standard Model (MSSM) with squark generation mixing. We show that the mixing effects can be very large in a significant range of quark-flavour-violating parameters despite the very strong constraints on quark-flavour-violation (QFV) from experimental data on B mesons.
We find that under favourable...
Arnaud Lucotte
(LPSC Laboratoire de Physique Subatomique et de Cosmologie (LPSC))
23/07/2010, 12:10
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
First results from the ATLAS experiment at the LHC at center of mass energy of 7 TeV on top quark studies will be presented. In addition prospects on top quark studies at ATLAS including the top quark mass, top quark decay properties, spin correlations and anomalous couplings, rare decays and single top quark production will be discussed.
Giampiero Mancinelli
(Centre de Physique des Particules de Marseille (CPPM)-Universite)
23/07/2010, 12:13
The LHCb experiment has the potential, during the 2010-11 run, to observe, or improve significantly the exclusion bounds on, the rare decays B_s ->mu^+mu^- and D0 -> mu^+mu^-. These studies will provide very sensitive probes of New Physics effects. High sensitivity to New Physics contributions is also achieved by searching for direct CP violation in B0 -> K* gamma, performing a time dependent...
Prof.
Cai-Dian Lu
(IHEP,Beijing)
23/07/2010, 12:15
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
It is a difficult task to probe internal structures of the scalar mesons below or near 1GeV. In the SU(3) symmetry limit, the semileptonic D^+ --> Sl^+ nu and B^+ Slnubar decays, with S=a_0, f_0 and sigma, are found to obey very different sum rules in the two scenarios for scalar mesons. Thus it can uniquely distinguish the qqbar and the tentraquark descriptions for light scalar mesons...
Marc Moniez
(IN2P3-CNRS)
23/07/2010, 14:00
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
Wide field astronomy has recently produced important results for the dark matter and dark energy problematics. I will summarize the scientific impact of the ongoing wide field surveys and focus on the future LSST program (Large Synoptic Survey Telescope). This program will use a 8.4 m diameter telescope, equipped with a 3.2 Gpixel wide field camera. Cosmological studies is one of his main objectives.
Dr
Thomas Latham
(University of Warwick)
23/07/2010, 14:00
Constraints on the CKM Unitarity Triangle angle beta can be obtained from a time-dependent Dalitz-plot analysis of the decay B0 -> D pi+ pi-. We present preliminary results of an analysis of the B0 -> D pi+ pi- Dalitz plot using the final BaBar dataset, consisting of around 471 million BBbar pairs.
Prof.
Giampiero Passarino
(Torino University)
23/07/2010, 14:00
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
Higgs production cross sections, including electroweak NLO corrections will be discussed
Prof.
Ian Balitsky
(JLab/ODU)
23/07/2010, 14:00
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
I review the calculation of the next-to-leading order behavior of high-energy amplitudes in N=4 SYM and QCD using the operator expansion in Wilson lines.
Prof.
Sinya Aoki
(University of Tsukuba)
23/07/2010, 14:00
09 - Progress in Lattice Techniques and New Results
Parallel Session Talk
I review the recent progress on the determination of potentials between baryons from lattice QCD, based on works by HAL (Hadron to Atomic nuclei from Lattice) QCD Collaboration, who uses the Bethe-Salpter amplitudes to extract potentials in quantum field theories. The method is first applied to two nucleons on the lattice with quenched QCD simulations. By disentangling the mixing between the...
Dr
Beijiang Liu
(Institute of High Energy Phsics (CAS) and Hong Kong University)
23/07/2010, 14:00
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
There has been much arguments on whether sigma and kappa exist, due to the facts that the total phase shifts in the lower mass region are much less than 180 degrees and they do not fit into ordinary meson nonets; also whether f0(980) and a0(980) are part of the ground-state quark-antiquark family or whether they are 4-quark states, hybrids or K Kbar molecules. The study of their nature has...
Zoltan Ligeti
(Lawrence Berkeley National Laboratory)
23/07/2010, 14:00
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
We explore which new physics signatures could be discovered in the first year of the LHC, beyond the expected sensitivity of the Tevatron data and other constraints. We construct "supermodels", for which the LHC sensitivity even with only 10 pb-1 useful luminosity is greater than that of the Tevatron with 10 fb-1. The simplest scenarios involve s-channel resonances in the quark-antiquark and...
huang yanping
(IHEP)
23/07/2010, 14:10
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
The decays of psi'-> pi pi J/psi (J/psi -> gamma p pbar), psi'-> gamma ppbar, J/psi-> gamma p pbar, J/psi -> gamma pi pi eta’ and J/psi -> omega pi pi eta are analyzed using the samples of 2.26 X 10^8 J/psi events and 1.06 X 10^8 psi' events collected with the BESIII detector. In psi'-> pi pi J/psi (J/psi -> gamma p pbar) decay, an enhancement at p pbar threshold is observed. The enhancement...
Paul Richard Newman
(School of Physics and Astronomy-University of Birmingham)
23/07/2010, 14:17
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
The production of highly energetic forward neutrons has been studied in deep-inelastic positron-proton scattering. The data were taken with the H1 detector at HERA in the years 2006-2007 and correspond to an integrated luminosity of 122 pb^-1. Semi-inclusive cross sections have been measured in the range of four momentum transfer squared 6 < Q^2 < 100 GeV^2, Bjorken scaling variable 1.5 *...
Dr
Georgios Choudalakis
(University of Chicago, Enrico Fermi Institute)
23/07/2010, 14:20
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
We summarize the analyses of high-pt jets in early pp collisions recorded with the ATLAS detector. The data are confronted with Standard Model predictions with the goal of searching for new phenomena: resonances, gravitationally mediated effects, and contact interactions.
Prof.
Claudia de Rham
(Geneva University)
23/07/2010, 14:20
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
The idea of degravitation is to account for the small late time acceleration of the Universe by modifying gravity at large distances. After reviewing the fundamental aspects of degravitation, I will discuss the importance of interactions in models that can exhibit degravitation, and present the Galileon as a broader class of modifications of gravity. Finally I will establish a link between the...
Krisztian Peters
(FNAL)
23/07/2010, 14:25
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
We present a search for Higgs bosons decaying to the di-photon final state using 5 fb-1 of data at a center-of-mass energy of sqrt(s)=1.96~TeV at the Fermilab Tevatron collider. Whilst the branching ratio to the di-photon final state is small in the Standard Model, this channel contributes appreciably to the overall Higgs sensitivity at Tevatron. In parallel, the limit is re-interpreted in...
Evgeniy Solodov
(BudkerINP)
23/07/2010, 14:25
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
* Initial State Radiation Physics Studies at BABAR
We present recent results obtained at BABAR from low energy e+e- annihilations, produced via initial state radiation. Low energy hadronic cross sections provide essential experimental input for calculating hadronic corrections to the muon anomalous magnetic moment, while studies of final states and intermediate structures with unprecedented...
Prof.
Colin Morningstar
(Carnegie Mellon University)
23/07/2010, 14:30
09 - Progress in Lattice Techniques and New Results
Parallel Session Talk
Progress in determining the spectrum of excited baryons and mesons in lattice QCD is described. Large sets of carefully-designed hadron operators have been studied and their effectiveness in facilitating the extraction of excited-state energies is demonstrated. A new method of stochastically estimating the low-lying effects of quark propagation is proposed which will allow reliable...
Min-Zu Wang
(Physics Department-National Taiwan University (NTU))
23/07/2010, 14:32
We report the first observation of inclusive B -> X_s eta decays using a large sample of B-anti{B} pairs accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric e^+e^- collider. The X_s system is a charmless inclusive state with unit strangeness, and is reconstructed using a pseudo-inclusive technique from a kaon and up to four pions, of which at most one pion...
Samuel Wallon
(LPT, Université Paris-Sud, CNRS, Orsay and UPMC Univ. Paris 06)
23/07/2010, 14:37
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
We calculate cross section and azimuthal decorrellation of Mueller Navelet jets at the LHC in the complete next-lo-leading order BFKL framework, i.e. including next-to-leading corrections to the Green's function as well as next-to-leading corrections to the Mueller Navelet vertices.
The obtained results for standard observables proposed for studies of Mueller Navelet jets show that both...
Vladimir Druzhinin
(SLAC)
23/07/2010, 14:40
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
* Recent results on two-photon physics at BABAR
Two-photon processes, studied at e+e- colliders via the reaction e+ e---> e+ e- gamma gamma* --> e+ e- Pseudoscalar, provide an approach to a number of important QCD tests. We discuss the recent BABAR measurements of gamma gamma* -> pi0 transition and gamma gamma*-> eta_c transition form factors. We also report on a new measurement of the gamma...
Konstantinos Kousouris
(Fermilab)
23/07/2010, 14:40
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
We report on a search for new physics in dijet production at CMS, using the first pp collision data at sqrt{s}=7 TeV provided by CERN's Large Hadron Collider. The measured dijet mass spectrum is compared with QCD predictions. We use the dijet mass spectrum to search for dijet resonances that could come from several models, such as, axigluons, flavor univerals colorons, excited quarks or E6...
Jason Steffen
(Fermilab)
23/07/2010, 14:40
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
A scalar field is a favorite candidate for the particle responsible for dark energy. However, few theoretical means exist that can simultaneously explain the observed acceleration of the Universe and evade tests of gravity. The chameleon mechanism, whereby the properties of a particle depend upon the local environment, is one possible avenue. I present the results of the Chameleon Afterglow...
Pierluigi Totaro
(INFN-Sezione di Trieste)
23/07/2010, 14:45
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
We present a search for a Standard Model Higgs boson in events with a final state containing two taus and two jets at a center-of-mass energy of sqrt(s)=1.96 TeV at the Fermilab Tevatron collider. The final states are sensitive to a combination of associated production of a W/Z boson with a Higgs boson, vector boson fusion and gluon-gluon fusion production processes. Inclusion of the data set...
Alessandro Gaz
(Department of Physics-University of Colorado)
23/07/2010, 14:45
We report a number of recent meaurements of B-meson decays to purely hadronic final states that do not contain charm mesons. These studies are based on the very large sample of B\overline{B} events collected by the BABAR detector at SLAC's e+e- asymmetric collider B-factory when it operated on the Upsilon(4S). We include in this paper the results of: a Dalitz plot analysis of B0->KsKsKs which...
Francesco Hautmann
(University of Oxford)
23/07/2010, 14:54
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
At the Large Hadron Collider (LHC) it will become possible for the first time to investigate experimentally the forward region in hadron-hadron collisions via high-p_T processes. In the LHC forward kinematics QCD logarithmic corrections in the hard transverse momentum and in the large rapidity interval may both be quantitatively significant. The theoretical framework to resum consistently...
Oleg Teryaev
(Joint Inst. for Nuclear Research (JINR))
23/07/2010, 14:55
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
The earlier derived sum rule for the axial current formfactors with one real and one virtual photon is applied for the analysis of meson transition formfactors. The exactness of sum rule at all virtual photon momenta due to t'Hooft principle requires the existence of at least one axial meson which assumes the role of pion in the anomaly description at large momenta squared. The relation...
Dr
Roman Nevzorov
(University of Hawaii)
23/07/2010, 14:55
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
It is well known that in no--scale supergravity global symmetries protect local supersymmetry (SUSY) and a zero value for the cosmological constant. The breakdown of these symmetries that ensures the vanishing of the vacuum energy density near
the physical vacuum leads to the natural realization of the multiple point principle (MPP) assumption, i.e. results in the set of degenerate vacua...
Constantia Alexandrou
(University of Cyprus)
23/07/2010, 14:55
09 - Progress in Lattice Techniques and New Results
Parallel Session Talk
We present recent results on the nucleon form factors and low moments of generalized parton districbutions. They are obtained using two degenerate flavors of dynamical twisted mass fermions corresponding to pion masses in the range of about 260-450 MeV. Finite volume and cut-off effects are investigated. Chiral extrapolations of the magnetic moment, Pauli and Dirac radii and the axial charge...
Juan Antonio Aguilar Saavedra
(University of Granada and LIP)
23/07/2010, 15:00
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
I will show how the general trilinear interactions of the top quark (or any other fermion) arising from dimension-six gauge invariant operators are simplified when several operators in the Buchmuller & Wyler list, recently found to be redundant (arxiv:0811.3842, arxiv:0904.2387) are dropped. I will present some practical applications of this simplification for phenomenology, including the...
Ignacio De Bediaga Hickman
(Centro Bras. de Pesquisas Fisicas (CBPF))
23/07/2010, 15:00
Studies of two- and tree-body charmless hadronic decays of B mesons have high sensitivity to possible contributions from New Physics. Precision measurements involving these decays will be performed at LHCb, notably those of CP-violating asymmetries. These measurements benefit from a trigger system which is very efficient for hadronic final states and excellent particle identification...
Abid Patwa
(Brookhaven National Laboratory (BNL))
23/07/2010, 15:05
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
We present a search for non-Standard Model Higgs bosons at a center-of-mass energy of sqrt(s)=1.96 TeV using up to 6 fb-1 of Tevatron data. Searches for charged and neutral Higgs bosons predicted in MSSM and NMSSM models will be discussed.
Hideyuki Nakazawa
(National Central University)
23/07/2010, 15:05
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
* Experimental study of eta eta production in two-photon collisions
The differential cross section for the process gamma gamma -> eta eta has been measured in the kinematic range above the eta eta threshold, 1.096 GeV < W < 3.8 GeV, in almost the whole solid angle, |cos theta*| < 0.9 or < 1.0 depending on W, where W and theta* are the energy and eta scattering angle, respectively, in the...
Mitsuo J. Hayashi
(Tokai University)
23/07/2010, 15:10
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
By using a string-inspired modular invariant supergravity model, which was proved well to explain WMAP observations appropriately, a mechanism of preheating just after the end of inflation is investigated. By using the canonically normalized and diagonalized scalars, the decay rates of these fields are calculated inflaton S into gauge sector fields.
The reheating temperature is estimated by...
Dr
Edmond Berger
(ANL)
23/07/2010, 15:11
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
We evaluate the kinematic distributions in phase space of 4-parton final-state subprocesses produced by double parton scattering, and we contrast these with the final-state distributions that originate from conventional single parton scattering. Our goal is to establish the distinct topologies of events that arise from these two sources and to provide a methodology for experimental...
Susan Haines
(University of Cambridge)
23/07/2010, 15:13
We present the first studies of decays of the type B -> DX, where D represents a charmed meson (D0, D(*)+ or D_s) from the LHCb experiment at CERN. Our studies use data accumulated during the 2010 run of the LHC. This work represents the first steps on a programme towards a precision measurement of the angle gamma of the CKM Unitarity Triangle. The prospects for this gamma measurement will be reviewed.
jose Rodriguez-Quintero
(University of Huelva)
23/07/2010, 15:20
09 - Progress in Lattice Techniques and New Results
Parallel Session Talk
QCD is believed to be the theory of the strong interactions with, as only inputs, one mass parameter for each quark species and the value of the QCD coupling constant at some energy or momentum scale in some renormalization scheme. This is Lambda_QCD, the only non-perturbative parameter in the limit of massless quarks, to be taken from experiment, and the one which expresses the scale of...
Nathan Goldschmidt
(Univ. of Florida)
23/07/2010, 15:20
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
We describe searches for resonant top-antitop production at the Tevatron. Resonant top pair production could arise from the decays of massive Z-like bosons in extended gauge theories, KK states of the gluon or Z, axigluons, topcolor, and other BSM theories. We use different techniques to study the top-antitop invariant mass spectrum and set model independent limits on new resonant top-antitop...
Ahmed Ali
(DESY)
23/07/2010, 15:20
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
We study the spectroscopy and dominant decays of the bottomonium-like tetraquarks (bound diquarks-antidiquarks), focusing on the lowest lying P-wave [bq][bbar qbar] states Y_[bq] (with q=u,d), having J^PC=1^--. To search for them, we analyse the recent BaBar data obtained during an energy scan of the e+ e- -> b bbar cross section in the range of sqrt(s)=10.54 to 11.20 GeV. We find that these...
Prof.
Sally Dawson
(BNL)
23/07/2010, 15:25
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
We present the one-loop electroweak effects for the process of semi-inclusive b-Higgs production at the LHC. The electroweak effects are significant for heavy Higgs bosons and can be obtained using an effective theory approach. We also discuss new results for the merging of the 4 flavor number parton distribution scheme and the 5-flavor number parton distribution scheme for the calculation...
Dr
Fabien Cavalier
(Laboratoire de l'Accelerateur Lineaire Orsay)
23/07/2010, 15:25
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
After several years of construction and commissioning, LIGO, GEO600 and Virgo gravitational waves detectors have reached or exceeded their foreseen sensitivities and are in operation for few years. Even if a first detection remains unlikely with these sensitivities, meaningful results from the astrophysical point of view have been obtained on gamma-ray bursts or pulsars for example. For the...
Guy Wilkinson
(Nuclear Physics Laboratory)
23/07/2010, 15:26
The 818 fb-1 dataset collected at the psi(3770) resonance at CLEO-c offers unique possibilities for measuring strong phase differences in neutral D decays. The measurements require that both D mesons in the event are fully reconstructed, usually with one decaying to the signal mode of interest, and the other to a CP-eigenstate. The strong phase differences extracted from these decays are...
Dr
Roman Pasechnik
(Uppsala University)
23/07/2010, 15:28
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
We present a simple QCD-based model where the soft gluon rescattering between final state partons in deep inelastic scattering leads to events with large rapidity gaps and a leading proton. In the framework of this model the amplitude of the soft gluon exchanges is calculated in the eikonal approximation to all orders in perturbation theory. Both large and small invariant mass M_X limits are...
Pablo G Ortega
(University of Salamanca)
23/07/2010, 15:35
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
In the last years, a number of exciting discoveries of new hadron states have challenged our description of the hadron spectroscopy. Among these so called XYZ states, one of the most mysterious states is the well established X(3872).
In Ref.[1] we performed a coupled channel calculation of the 1^++ ccbar sector including qqbar and DD* molecular configurations; in the framework of a...
Dr
Enno E. Scholz
(University of Regensburg)
23/07/2010, 16:15
09 - Progress in Lattice Techniques and New Results
Parallel Session Talk
Quantum Chromodynamics with two mass degenerate light quark flavors and an additional single heavier quark flavor has been simulated on the lattice using the domain wall fermion formulation. These simulations cover a range of dynamical pion masses between 300 and 420 MeV and were performed at two different values for the lattice spacing with 1/a=1.73 and 2.32 GeV and a linear lattice extent of...
Fernando Martinez-Vidal
(Universidad de Valencia)
23/07/2010, 16:15
Using data from approximately 470 million B-Bbar pair events collected with the BaBar detector at SLAC's PEP-II e+e- B-factory running on the Upsilon(4S), we have made a number of measurements that are sensitive to the Cabibbo-Kobayashi-Maskawa CP-violating angle gamma. These include a measurement of gamma from a Dalitz Plot analysis of neutral D meson decays to K^0_S pi^+ pi^- and ...
Christine MARQUET
(CENBG University Bordeaux I and CNRS)
23/07/2010, 16:15
The NEMO-3 experiment located in the Modane Underground Laboratory is searching for neutrinoless double beta decay. The experiment has been taking data since 2003 with seven isotopes. The main isotopes are 7kg of 100Mo and 1kg of 82Se.The new results with 4 years of data taking will be presented for 100Mo. No evidence for neutrinoless double beta decay has been found to date. The data are...
Alison Lister
(University of Geneva)
23/07/2010, 16:15
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
Fifteen years since the discovery of top at the Tevatron, with the large Run 2 dataset in hand and plenty of analysis experience, we have now reached the point where we can perform in-depth examinations of the top quark event sample for evidence of physics beyond the Standard Model. We present a search for a massive quark (t') decaying to Wq or Wb and thus mimicking the top quark decay...
Aude Gehrmann-De Ridder
(ETH Zurich)
23/07/2010, 16:15
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
All physics reactions at the LHC are initiated by partonic processes, which are determined by QCD. To interpret potential signals and their backgrounds, one thus requires a solid understanding of the QCD dynamics, which is achieved by including higher order perturbative corrections. We review the recent progress on higher order calculations in QCD, focusing on the calculation of multi-leg...
Martin Goebel
(DESY - University of Hamburg)
23/07/2010, 16:15
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
Gfitter results from the global Standard Model (SM) fit to electroweak precision data, including newest Tevatron measurements, are reviewed and discussed. Constraints on the Higgs and top-quark masses, as well as on alpha_s(M_Z), are studied in some detail, and outlooks to the LHC and ILC eras are presented. Information from the electroweak fit on loop contributions from beyond-SM models is...
Arafat Gabareen Mokhtar
(SLAC / Stanford University)
23/07/2010, 16:15
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
* A study of radiative Upsilon(2S) and Upsilon(3S) transitions using converted photons
We present a study of the radiative transitions from decays of the Upsilon(2S) and Upsilon(3S) resonances using photons that have converted into an e+e- pair. This study uses data collected with the BABAR detector operating at the SLAC PEP-II B-factory on the Upsilon(2S) and Upsilon(3S) resonances.
*...
Jose Benitez
(SLAC)
23/07/2010, 16:30
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
* Study of the inclusive production of the D pi and D* pi final states
We present a study of the mass spectra of the D+pi-, D*+pi-, and D0pi+ final states in search for unobserved excited states of the D mesons. We use a dataset corresponding to ~454 fb^-1 of e+e- collisions collected by the BABAR detector at center-of-mass energies near 10.58 GeV. The final states are reconstructed...
Mr
Nikhil Jayant Joshi
(Tata Institute of Fundamental Research, Mumbai)
23/07/2010, 16:30
We present a measurement of the unitarity triangle angle phi_3 using Dalitz plot analysis of three-body neutral D decays from the B^+ --> D^{(*)}K^{(*)+} process. The results are based on a large sample of B anti-{B} pairs recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB e^+e^- collider. The decay B --> D^{(*)} K^{(*)} (D = D0 or anti-{D}0) includes the b --> u...
Michael Mulhearn
(University of Virginia)
23/07/2010, 16:35
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
A combination of searches for Standard Model and beyond Standard Model Higgs boson production at DZero using a data sample up to 7 fb-1 of integrated luminosity is performed. For Standard Model searches we determine combined upper 95% C.L. limits on the ratio of the Higgs boson cross section times the branching ratio to its Standard Model prediction for Higgs boson masses between 100 and 200 GeV/c2.
Angelo Nucciotti
(Univ. Milano-Bicocca and INFN Sez. Milano-Bicocca)
23/07/2010, 16:35
The search for neutrinoless double beta decay is a powerful tool to assess the neutrino mass scale and to establish whether the neutrino is a Majorana or a Dirac particle.
To date, CUORE is the only fully approved next generation 1-ton size experiment with the goal of approaching the inverted hierarchy region of the effective neutrino mass spectrum.
CUORE is an array of 988 TeO2 cryogenic...
Prof.
Matthias Steinhauser
(KIT)
23/07/2010, 16:35
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
In this talk we consider the production of the Standard Model Higgs boson in the gluon fusion process to NNLO. An approach is presented which allows the calculation of the cross section beyond the heavy-top quark approximation thus leading to results which include the effects of a finite top quark mass. Numerical results are shown for the CERN Large Hadron Collier (LHC).
Prof.
Pyungwon Ko
(KIAS)
23/07/2010, 16:35
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
Motivated by a possible anomaly in the forward-backward (FB) asymmetry of top quark (A_FB) observed at the Tevatron, we perform a model independent analysis on qqbar -> ttbar using an effective lagrangian with dim-6 four-quark operators.
We derive necessary conditions on new physics structures and the couplings that are consistent with the $t\bar{t}$ production cross section and A_FB measured...
Mark Edward Mattson
(Dept of Physics and Astronomy-Wayne State U.)
23/07/2010, 16:45
The CDF experiment has previously reported evidence for D0-D0bar mixing with a significance equivalent to 3.8 standard deviations based on the time-dependent ratio of the decay rates for D0 --> K^+pi^- and D0 -->K^-pi^+, and charge-conjugates. That measurement was based on an integrated luminosity of 1.5 fb-1 and achieved sensitivities of +-0.35*10-3 and +-7.6*10-3 on the mixing parameters...
Dr
Michele Della Morte
(Institut fuer Kernphysik, Mainz)
23/07/2010, 16:45
09 - Progress in Lattice Techniques and New Results
Parallel Session Talk
We review the most recent lattice results on a few selected hadronic quantities and discuss some recent theoretical development. We try to put the emphasis on the challenges, which have to be faced, on the way to precise heavy flavour physics on the lattice.
Ian Watson
(University of Sydney)
23/07/2010, 16:45
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
* Search for 1P -> 1S radiative transitions of D mesons
We present a search for B- -> pi- D^**0, D^**0 -> gamma D0 with a data sample from the Belle detector at the KEKB e+e- collider containing 771 x 10^6 BBbar pairs. In preliminary studies, we found that the corresponding pionic decays, D^**0 -> pi0 D0 are important backgrounds. These modes have not previously been studied; we measure them...
Prof.
Stefan Dittmaier
(Universitaet Freiburg)
23/07/2010, 16:52
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
The production of t anti-t b anti-b final states represents one of the most important beackground processes for Higgs production in association with top-quark pairs at the LHC. A good background control is indispensible for an analysis of the ttH(->bb) signal, requiring next-to-leading order (NLO) predictions for both signal and background. The talk describes a recently completed NLO QCD...
Dr
Adam Lyon
(FERMI NATIONAL ACCELERATOR LABORATORY)
23/07/2010, 16:55
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
We study same-charge dilepton events and WZ resonances at the Tevatron. Same sign dilepton events are rare inthe standard model and could indicate new physics processes such as chargino neutralino production in super symmetric models. A model-independent search is presented. A second analysis in which examines both lepton + jets and fully leptonic final states are used to search for...
Karolos Potamianos
(Purdue University)
23/07/2010, 16:57
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
A combination of searches for Standard Model and beyond Standard Model Higgs boson production at CDF using a data sample up to 6.0 fb-1 of integrated luminosity is performed. For Standard Model searches we determine combined upper 95% C.L. limits on the ratio of the Higgs boson cross section times the branching ratio to its Standard Model prediction for Higgs boson masses between 100 and 200 GeV/c2.
Matthew Bellis
(Stanford University)
23/07/2010, 17:00
We report on D0 mixing and searches for CP violation in charm meson decays using the large sample of charm anti-charm produced in e+e- annihilation data collected with the BaBar detector at the PEP-II asymmetric-energy B Factory near a center-of-mass energy of 10.58 GeV. A direct measurement of D0-D0bar mixing parameters through a time-dependent amplitude analysis of the Dalitz plots of D^0...
Mauro Verzetti
(INFN Torino)
23/07/2010, 17:05
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
* Measurement of Upsilon(5S) decays to B0 and B+ mesons
Decays of the Upsilon(5S) resonance to channels with B+ and B0
mesons are studied using a 23.6 fb^-1 data sample collected with
the Belle detector at the KEKB asymmetric-energy e+e- collider.
Fully reconstructed B+ -> J/psi K+, B0 -> J/psi K*0, B+ -> Dbar0 pi+ and B0 -> D- pi+ decays are used to obtain the charged and neutral...
Roberto Bonciani
(LPSC, Grenoble)
23/07/2010, 17:09
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
We review the status of the theoretical predictions for the top-anti top production in hadronic collisions, paying particular attention to the pair production at the LHC. We stress the need for a complete theoretical analysis that includes higher-order quantum corrections and we discuss recent theoretical calculations at the level of NNLO.
Dr
Elvira Gamiz
(Fermilab)
23/07/2010, 17:15
09 - Progress in Lattice Techniques and New Results
Parallel Session Talk
Heavy quark quantities are useful for testing lattice techniques against well known experimental results, as well as for testing the Standard Model (SM) itself, and searching for physics beyond the SM. I will review the results of recent lattice calculations relevant for this program including those of B and D decay constants and semileptonic decay form factors, and neutral B mixing. The...
Prof.
Carter Hall
(University of Maryland)
23/07/2010, 17:15
The standard model has difficulty accommodating the tiny neutrino masses which are observed in nature, but light neutrinos arise naturally in many standard model extensions, including many grand unified theories. Many of these models also predict that neutrinos should be Majorana-type fermions, which would violate the conservation of lepton number. The EXO collaboration is carrying out a...
Dörthe Ludwig
(DESY/ University of Hamburg)
23/07/2010, 17:15
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
Physics beyond the Standard Model (SM) can modify the relations between electroweak observables and their theoretical predictions. Such effects can be parametrised in terms of effective, so-called oblique parameters. A global fit of the electroweak SM, as performed with the Gfitter package, allows one to determine the oblique parameters and to derive constraints on new physics. In this talk,...
Tatsuya Masubuchi
(University of Tokyo)
23/07/2010, 17:19
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
The search for Higgs bosons at the Large Hadron Collider (LHC) is based on the analysis of independent final states, such as photon, tau, W and Z pairs. The Higgs discovery potential of ATLAS for each independent final state, as well as for combined channels, is reviewed and discussed. Results are presented for an integrated luminosity for 1/fb at 7 TeV center of mass energy at the LHC....
Kai Yi
(Physics and Astronomy Department-University of Iowa)
23/07/2010, 17:25
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
* Updated studies of exotic J/psi phi structures at CDF
We report updated studies of the J/psi phi mass spectrum in exclusive B+ --> J/psi phi K+ decays collected by the CDF experiment. Using an increased data sample of 5 fb^-1 and by adding new triggers we establish observation of the Y(4140) state in its J/Psi Phi decay and provide more precise measurements of its properties.
* Search...
Prof.
Nikolaos Kidonakis
(Kennesaw State University)
23/07/2010, 17:26
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
I present results for the resummation of soft-gluon contributions to QCD hard-scattering cross sections at next-to-next-to-leading logarithm accuracy. A key ingredient is the calculation of two-loop soft anomalous dimensions for the partonic processes. Explicit expressions and applications are provided for processes that involve massless partons and/or massive quarks.
Ivan Belyaev
(Institute for Theoretical and Experimental Physics (ITEP))
23/07/2010, 17:30
Precision measurements in charm physics offer a window into a unique sector of potential New Physics interactions. LHCb is poised to become a world leading experiment for charm studies, recording enormous statistics with a detector tailored for flavour physics. The conditions of the 2010-11 run of LHC are especially conducive to the collection of charm events, with a very large data set...
Alfredo Tomas
(University of Zaragoza)
23/07/2010, 17:30
Though Neutrino oscillation experiments have shown that neutrinos have finite rest mass, their absolute mass scale is still unknown. The exploration of the degenerate hierarchy, which corresponds to an effective neutrino mass up to 50 meV, is the goal of the next generation of neutrinoless double beta decay experiments. Very good energy resolutions and ultra-low background levels are the two...
Amarjit Soni
(BNL)
23/07/2010, 17:35
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
One of the most interesting theoretical scenarios for extending the Standard Model is based on the notion of a single warped extra-dimension. Though the original idea was proposed to address the Planck-weak hierarchy, it actually can also lead to an understanding of flavors. As purely a theory of flavor the UV cut-off may be much much less than the Planck mass and may be around 10^4 TeV. The...
Dr
Marat Gataullin
(Caltech)
23/07/2010, 17:39
02 - The Standard Model and Electroweak Symmetry Breaking
Parallel Session Talk
We overview the prospects for Higgs boson searches with a data sample of 1 fb-1 to be collected in pp-collisions at 7 TeV. We present sensitivity projections for SM-like decay modes H→WW→2l2v, H→ZZ→4l, H→ γγ (including their combination), the MSSM-like signature pp→bbΦ→bb(ττ), and, also discuss a few other possible models/searches. Preliminary results of data analyses validating a number of...
Felix Wick
(Karlsruhe)
23/07/2010, 17:40
04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy
Parallel Session Talk
We present a study of the first orbital excitations of the Lambda_c baryon, the resonances Lambda_c(2595) and Lambda_c(2625), in the decay channel Lambda_c+ pi+ pi- as well as the Lambda_c spin excitations Sigma_c(2455) and Sigma_c(2520) in its decays to Lambda_c+ pi- and Lambda_c+ pi+ reconstructed in a sample corresponding to 5.3 fb^-1 of data collected by the CDF experiment. Exploiting the...
Dr
Konstantin Chetyrkin
(Karlsruhe Institute of Technology (KIT))
23/07/2010, 17:43
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
We report on the first analytical, valid for a generic gauge group, calculations of the O(alpha_s^4) corrections to the Adler function and to DIS sum rules, in particular to the the Gross-Llewellyn Smith and to the Bjorken ones. We discuss a decisive check of correctness of our previous calculations of R(s) in QCD and the quenched QED beta-function at five loops, which was carried...
Xian-Wei Kang
(IHEP,China)
23/07/2010, 17:45
The charm quark offers interesting opportunities to cross-check the mechanism of CP violation precisely tested in the strange and beauty sectors. In this paper, we exploit the angular and quantum correlations in the D Dbar pairs produced through the decay of the psi(3770) resonance in a charm factory to investigate CP-violation in two different ways. We build CP-violating observables in...
Ivo de Medeiros Varzielas
(CFTP, Instituto Superior Técnico)
23/07/2010, 17:45
In models with flavour symmetries added to the gauge group of the Standard Model the CP-violating asymmetry necessary for leptogenesis may be related with low-energy parameters. A particular case of interest is when the flavour symmetry produces an exact mass independent lepton mixing scheme, leading to a vanishing CP-violating asymmetry. We present a model-independent discussion that confirms...
Dr
Igor Bogolubsky
(JINR)
23/07/2010, 17:45
09 - Progress in Lattice Techniques and New Results
Parallel Session Talk
Considerable efforts have been devoted during the last decade to exploring QCD's elementary two-point functions using the framework of lattice QCD. Thereby, much attention has been paid to the gluon and ghost propagators in Landau gauge whose low-momentum behavior has been explored using relatively coarse lattices to reach momenta as low as possible. To ultimately confront such lattice results...
Markus Bobrowski
(University of Regensburg)
24/07/2010, 09:00
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
We investigate the mixing of neutral charmed mesons within the Standard Model (SM), using the framework of Heavy Quark Expansion (HQE). In a recent study, we have argued that a CP phase of the order of 1 per mille to 1 per cent could be present in charm mixing in the SM. Our arguments rely on the enhancement of higher-dimensional terms in the HQE due to a lifting of the severe GIM suppression...
Thomas Becher
(University of Bern)
24/07/2010, 09:00
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
The production of hard photons in hadronic collisions is studied using Soft-Collinear Effective Theory (SCET). This is the first application of SCET to a physical, observable cross section involving energetic partons in more than two directions. The final resummed inclusive direct photon distribution is valid to next-to-next-to-leading logarithmic order (NNLL), one order beyond previous work....
Dr
Toshiyuki Iwamoto
(The University of Tokyo)
24/07/2010, 09:00
13 - Advances in Instrumentation and Computing for HEP
Parallel Session Talk
The MEG experiment, which searches for a rare muon decay, mu --> e gamma, to explore supersymmetric grand unification, has started physics run since 2008 at Paul Scherrer Institute, Switzerland. Its innovative detector system, which consists of a 900 liter liquid xenon scintillation photon detector and a positron spectrometer with a superconducting magnet, drift chamber, and timing counter,...
Prof.
Kaladi Babu
(Oklahoma State University)
24/07/2010, 09:00
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
I will summarize recent developments in 4-dimensional supersymmetric grand unified model building. A class of SUSY GUTs based on SO(10) will be presented which successfully addresses for the first time (i) the doublet-triplet splitting probelm to all orders, (ii) realistic quark and lepton mixing, (iii) gauge coupling unification including GUT scale threshold effects, and (i) the origin of...
Dr
Yoshihisa Obayashi
(Kamioka Observatory, ICRR, Univ. of Tokyo)
24/07/2010, 09:00
A large water Cherenkov detector Super-Kamiokande(SK) started data taking in April 1996 and has been continuously accumulating neutrino data.
Electronics system for SK data taking is fully upgraded on September 2008 to ensure stable observation for next 10 - 20 years and to improve sensitivity of the detector.
Recent results on atmospheric neutrino oscillation study from SK before and after...
Dr
Marek Kos
(Syracuse University/CDMS)
24/07/2010, 09:00
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
The Cryogenic Dark Matter Search (CDMS) is a world leader in sensitivity to Weakly Interacting Massive Particles (WIMPs). CDMS uses a combination of ionization and phonon energy to identify nuclear recoils arising from potential WIMP scatters. As published in Science vol. 327 p.1619, exposure from the final run of the CDMS-II detectors totalled 612 kg-days for the Ge detectors after...
Dr
Soumitra Nandi
(University of Torino)
24/07/2010, 09:15
We compute the O(alphas) corrections to the Wilson coefficients of the dimension five operators emerging from the Operator Product Expansion of inclusive radiative B decays. We employ an off-shell matching procedure and discuss the impact of the resulting O(alpha_s Lambda_QCD^2/m_b^2) corrections on the extraction of m_b and mu_pi^2 from the moments of the photon spectrum.
David Cassel
(Cornell University)
24/07/2010, 09:15
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
Using the full CLEO-c D0D0bar, D+D-, and DsbarDs* data samples, we have made precision measurements of many D meson semileptonic branching fractions and form factors. The results for the form factors of exclusive D+ and D0 semileptonic decays to K and π mesons agree well with recent Lattice QCD calculations. Using a non-parametric technique, we measure the form factor for D+->K0*bar e v_e...
Imad Laktineh
(Lyon)
24/07/2010, 09:20
13 - Advances in Instrumentation and Computing for HEP
Parallel Session Talk
The CALICE Collaboration is carrying out R&D for a highly granular calorimeter system, optimised for particle flow calorimetry at a future linear collider. Starting in 2006, a complete calorimeter chain (ECAL, HCAL and tail catcher) has been tested in muon, electron and hadron beams at CERN and Fermilab. Two electromagnetic calorimeters were tested, both based on tungsten absorber – one using...
Shin Ted Lin
(Academia Sinica)
24/07/2010, 09:20
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
Experiments with sub-keV sensitivities open a window to search for WIMPs at the mass range of less than 10 GeV and for axions through resonant absorption. We will present data taken with a 500-g Point Contact Germanium detector at the Kuo-Sheng Neutrino Laboratory in 2009-2010, which improve over previous sensitivities [1]. A dedicated experiment is now under preparation at the new China...
Juan Terron
(DESY)
24/07/2010, 09:20
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
The production of prompt photons is measured in the photoproduction regime of electron-proton scattering at HERA. Cross sections are measured for photons with transverse momentum and pseudorapidity in the range 6 < Et < 15 GeV and -1.0 < eta < 2.4, respectively. The results are compared with QCD predictions based on the collinear and on the k_T factorisation approaches. The first measurement...
Makoto Miura
(ICRR)
24/07/2010, 09:20
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
Grand Unified Theories (GUTs) is motivated by merging of the coupling constants of the strong, weak, and electromagnetic forces at a large energy scale (~ 10^16 GeV ), which is out of the reach of accelerators. One of the other general features of GUTs is that they allow lepton and baryon number violations and they predict instability of
nucleons. Then nucleon decay experiments are the direct...
sandra zavatarelli
(INFN Genova Italy)
24/07/2010, 09:20
Borexino is a real time liquid scintillator detector for low energy neutrino and antineutrino spectroscopy located at the Gran Sasso National Laboratories (Italy). Thanks to the unprecedented radiopurity of the target mass it is providing the first direct and simultaneous measurement of the solar neutrino survival probability in both vacuum-dominated (7Be ν ) and matter-enhanced regions (8B ν )...
Prof.
Brian Meadows
(University of Cincinnati)
24/07/2010, 09:30
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
The study of Charm Decays at SuperB provide unique opportunities to understand the Standard Model and constrain new physics, both at the Y(4S), and at charm threshold. We discuss the physics potential of such measurements from the proposed SuperB experiment with 75 ab-1 of data at the Y(4S) and a subsequent run dedicated to exploiting quantum correlations at the charm threshold.
Hyuncheong Ha
(Korea University)
24/07/2010, 09:30
We present a measurement of the charmless semileptonic decay B^0 --> pi^- l^+ nu using a large sample of untagged Upsilon(4S)--> B anti-B events collected with the Belle detector at the KEKB e^+ e^- asymmetric collider. From the results, we determine the branching fraction of the decay and extract the Cabibbo-Kobayashi-Maskawa matrix element |V_{ub}| using various approaches.
Prof.
Carter Hall
(University of Maryland)
24/07/2010, 09:35
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
Cosmological and astrophysical measurements indicate that our galaxy is filled with a new type of matter previously unknown to physics. This "dark matter" apparently has no electromagnetic or strong interactions, but an interaction of the strength of the weak nuclear force is strongly suggested by the data. The LUX collaboration is attempting to detect the faint signature of weakly interacting...
Konstantinos Vellidis
(Fermilab)
24/07/2010, 09:40
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
We report measurements of the direct photon pair production cross section in ppbar collisions at the Fermilab Tevatron Collider using data collected by the CDF and D0 experiments and corresponding to integrated luminosities of 5.3 and 4.2/fb, respectively. Differential cross section measurements are compared with different perturbative QCD predictions, indicating significant disagreements...
Prof.
Kalyana Mahanthappa
(University of Colorado)
24/07/2010, 09:40
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
: We propose the complex group theoretical Clebsch-Gordan coefficients as a novel origin of CP violation. This is manifest in our model based on SUSY SU(5) combined with the double tetrahedral group, T', as the family symmetry. Due to the presence of the doublet representations in T', there exist complex CG coefficients, leading to explicit CP violation in the model, while the Yukawa...
Dr
Masayuki Koga
(Tohoku University)
24/07/2010, 09:40
The KamLAND 1000 ton ultra pure LS environment has a good advantage for the double beta decay experiment. We are planning to install the 20m3 volume mini balloon with 136Xe loaded LS in 2011. The target sensitivity of Xe phase is 60 meV on neutrino mass using 400kg enriched Xe. We will report our progress of KamLAND Xe phase and recent analysis topics.
Markus Klute
(Massachusetts Institute of Technology)
24/07/2010, 09:45
13 - Advances in Instrumentation and Computing for HEP
Parallel Session Talk
In this presentation we will discuss the early experience with the CMS computing model from the last large scale challenge activities through the early collisions runs. Between the initial definition of the CMS Computing Model in 2004 and the start of high energy collisions in 2010, CMS exercised numerous scaling tests. We will discuss how those tests have helped prepare the experiment for...
Xavier Prudent
(Inst. fuer Kern- und Teilchenphysik (IKTP)-Technische Universita)
24/07/2010, 09:45
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
We report on the search for the rare decays B+ -> D+ K0 and B+ -> D+ K*0 decays using 426 fb-1 of data (468 10^6 BBbar pairs) collected at the Upsilon(4S) resonance with the BaBar detector at the PEP-II B factory at SLAC.
Jason Kumar
(University of Hawaii)
24/07/2010, 09:50
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
The recently proposed WIMPless dark matter scenario provides a dark matter candidate which can have a wide range of possible masses, while still retaining the naturally correct thermal relic density of the WIMP scenario. WIMPless dark matter thus leads to a broad array of possible signatures at current and upcoming experiments. We review the WIMPless scenario and discuss detection strategies....
Dr
Rong-Shyang Lu
(Physics Department - National Taiwan University (NTU))
24/07/2010, 10:00
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
We present preliminary results on the measurement of isolated photon production cross section in proton-proton collisions at sqrt(s) = 7 TeV, using data collected with the CMS detector. We estimate contribution of background from hadron decays (such as pi0 to two photons) with several variables, including the ratio of momentum measured in the tracker to the energy measured in the...
Michael Sigamani
(Dipartimento di Fisica G. Marconi-Universita di Roma I 'La Sapie)
24/07/2010, 10:00
We present partial branching fractions for inclusive charmless semi-leptonic B decays anti-B -> X_u l anti-nu, and the determination of the CKM matrix element |V_{ub}|. The analysis is based on a sample of Upsilon(4S) decays into B anti-B pairs collected with the BABAR detector at the PEP-II e+ e- storage rings. We select events using either the invariant mass M_X of the hadronic system, the...
Grelli Alessandro
(Utrecht)
24/07/2010, 10:00
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
Charm and bottom quarks have been proposed as probes to study hot quark matter produced in high-energy heavy-ion collisions. The detailed understanding of the charm cross-section in proton-proton collisions as well as the production mechanisms is of considerable interest as QCD test tool and as reference calibration for heavy-ion studies. Measurements of D mesons yield in minimum bias...
Dr
Antonio Marrone
(Univ. of Bari & INFN Bari)
24/07/2010, 10:00
Neutrino self interactions can play a substantial role during neutrino propagation near the Supernova core. In fact, self-induced transitions can alter neutrino spectra, depending on the mass hierarchy, producing splits and/or swaps of the spectra. We study how these effects depends on the neutrino luminosities and on the mixing parameters in two and three generations.
Graeme Andrew Stewart
(University of Glasgow)
24/07/2010, 10:05
13 - Advances in Instrumentation and Computing for HEP
Parallel Session Talk
In this paper we summarise ATLAS operations from the STEP09 campaign in June 2009 through to ATLAS taking data in the first 7 TeV collisions at the LHC in 2010. We describe the lessons which were learned from the STEP09 challenge, both in proving which parts of the system were in good shape, but also in highlighting those areas which required improvement. We then describe the experience of...
Prof.
Pyungwon Ko
(KIAS)
24/07/2010, 10:10
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
We consider a hidden sector with new confining gauge theory similar to ordinary QCD, and show that the lightest mesons in the hidden sector (hidden sector pion h) are automatically stable as a consequence of flavor conservation of hidden sector strong interaction.There would be more than one neutral Higgs-like scalar bosons, and they could decay mainly into the CDM pair, if that decay channel...
Gerhard Immanuel Brandt
(Deutsches Elektronen-Synchrotron (DESY))
24/07/2010, 10:10
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
This talk will cover the latest results on a variety of searches for new physics at HERA by the ZEUS and H1 Collaborations.
Junji Tojo
(KEK)
24/07/2010, 10:15
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
Photon identification is important for many physics signatures at the LHC, as well as for detector calibration purposes. Prompt photon identification in ATLAS relies on the fine granularity of the electromagnetic calorimeter, which provides event by event rejection of the dominant background from photons from pi^0 decays, and on the inner detector, which allows us to reconstruct photon...
Dr
Gabriel Perdue
(The University of Rochester)
24/07/2010, 10:15
MINERvA (Main INjEctoR nu-A) is a new few-GeV neutrino cross section experiment that recently began operations in the FNAL NuMI beam-line. 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 as well as a selection of nuclear targets. The experiment will...
Marco Pappagallo
(Universita & INFN, Bari)
24/07/2010, 10:15
05 - Heavy Quarks Properties (experiment and theory)
Parallel Session Talk
We present a measurement of the absolute branching fraction Br(Ds->µ v_µ) and Br(Ds->τ v_τ) and of the Ds decay constant, f_Ds, using 521 fb-1} of data collected by the BABAR detector at the PEP-II storage rings at SLAC. We also obtained an upper limit on Br(Ds->e v_e). Ds events are detected by reconstructing the recoiling system, D K X γ, in events of the type e+e-->D K X Ds*, where Ds*->Ds...
Mr
Florian Bernlochner
(Humboldt University of Berlin)
24/07/2010, 10:15
The total B -> X_s gamma rate and the CKM-matrix element |Vub| determined from semileptonic B-meson decays play an important role in finding indirect evidence of new physics in the flavor sector of the Standard Model, complementary to the direct searches at LHC and Tevatron. Their determination requires the precise knowledge of the parton distribution function for the b quark in the B-meson...
Prof.
Shou-Hua Zhu
(ITP, Peking University)
24/07/2010, 11:00
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
Dark matter signature can be observed via the cosmic ray (electron/positron, neutrino, gamma, etc), as well as at LHC and/or low energy colliders (e.g. BES). In this talk, I will review our recent several studies on these aspects.
Prof.
Satyanarayan Nandi
(Oklahoma State University)
24/07/2010, 11:00
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
We present a new framework to understand the long-standing fermion mass hierarchy puzzle. We extend the Standard Model gauge symmetry by an extra local U(1)_S symmetry, broken spontaneously at the electroweak scale. All the SM particles are singlet with respect to this U(1)_S. We also introduce additional flavor symmetries, U(1)F’s, with flavon scalars Fi, as well as vectorlike quarks and...
Dr
Said Hasan
(Universita dell'Insubria - Como and INFN Milan-Bicocca)
24/07/2010, 11:00
13 - Advances in Instrumentation and Computing for HEP
Parallel Session Talk
Bent crystals are devices able to deflect ultrarelativistic particle beams, exploting the electric fields, present at the atomic scale, which are equivalent to a magnetic field of hundreds of tesla. For this reason they are currently used in particle accelerators for beam extraction, splitting and collimation. Inside a bent crystal, several particle trajectories are possible as a function of...
Wolfgang Dungel
(Austrian Academy of Sciences)
24/07/2010, 11:00
We present measurements of the branching fraction and the HQET form factors rho^2, R_1 and R_2 for the decay B0 -> D*-l^+ nu using untagged Upsilon(4S) -> B anti-B events. The Cabibbo-Kobayashi-Maskawa matrix element |V_{cb}| is extracted and a test of the form factor parametrization is presented. The results are based on a large data sample recorded by the Belle detector at the KEKB e+ e-...
Gilvan Augusto Alves
(Centro Bras. de Pesquisas Fisicas (CBPF))
24/07/2010, 11:00
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
We review several measurements using data collected by the D0 experiment at the Fermilab Tevatron ppbar collider at sqrt{s}=1.96 TeV and corresponding to an integrated luminosity of 1 fb-1. A sample of photon+3-jet events is used to determine the fraction of events with double parton scattering as a function of the transverse momentum of the second jet. We also report measurements of the...
Dr
Masaki Ishitsuka
(Tokyo Institute of Technology)
24/07/2010, 11:00
Double Chooz is a reactor neutrino oscillation experiment which aims at the discovery of the last neutrino mixing angle, theta_{13}. The expected sensitivity to sin^2(2theta_{13}) reaches 0.03 (90% C.L.) which is approximately a factor 5 better than the current limit. Double Chooz will use two identical detectors with different baselines to suppress the systematic uncertainties down to 1% or...
Dr
Barry Barish
(CalTech)
24/07/2010, 11:00
A reference design and costing for a 500 GeV electron-positron linear collider based on superconducting radio frequency acceleration (ILC) was produced by the Global Design Effort(GDE) in 2007. That design and the risk mitigating R&D toward a technical design are being evolving with a goal of developing a technical design report and implementation plan at the end of 2012. The ILC TDR, CLIC...
Prof.
Soo-Bong Kim
(Seoul National University)
24/07/2010, 11:15
The RENO (Reactor Experiment for Neutrino Oscillation) is under construction to measure the value of the smallest and unknown neutrino mixing angle theta_13. The experiment will compare the measured fluxes of electron antineutrinos at two detectors located at 290 m and 1.4 km distances from the center of the Yonggwang nuclear reactors in Korea, with world-second largest thermal power output of...
Antonio Petrella
(INFN, Sezione di Ferrara-Universita di Ferrara)
24/07/2010, 11:15
We present a set of measurements of semileptonic B meson decays to charm using the BABAR data set collected at the SLAC e+e- B-factory operating on the Upsilon(4S) resonance. This paper includes: a report on the observation of the B -> Ds K l nu X decay mode the knowledge of which provides input to the "1/2 vs 3/2 puzzle" of semileptonic B decays into broad D** states, where there is...
Prof.
Robert Johnson
(University of California at Santa Cruz)
24/07/2010, 11:20
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
The Fermi Gamma-ray Space Telescope, formerly named GLAST, is a mission in low-Earth orbit to observe gamma rays from the cosmos in the broad energy range from 20 MeV to >300 GeV, with supporting observations of gamma-ray bursts from 8 keV to 30 MeV. The telescope far surpasses previous generations in its ability to detect and localize faint gamma-ray sources, as well as its ability to see...
Swagato Banerjee
(University of Victoria)
24/07/2010, 11:20
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
The B-Factories have accumulated huge data sets and provide an important window into possible new physics. In this talk, the latest search results for physics beyond the standard model will be presented from both BABAR and Belle experiments.
Christina Mesropian
(Rockefeller University)
24/07/2010, 11:20
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
The CDF Collaboration is working on a systematic study of the underlying event, Minimum Bias events, diffractive processes, and other non-perturbative observables. Such measurements have a two-fold goal of increasing our understanding of soft QCD - mainly through comparison with MC generators - and of reducing the uncertainties on backgrounds for many high-pt analyses. We review the latest...
Simon George
(Royal Holloway)
24/07/2010, 11:20
13 - Advances in Instrumentation and Computing for HEP
Parallel Session Talk
In 2010 ATLAS has seen the first proton-proton collisions at 7 TeV. Later this year a collision rate of nearly 10 MHz is expected. Events of potential interest for physics analysis are selected by a three-level trigger system, with a final recording rate of about 200 Hz. The first level (L1) is implemented in customized hardware, the two levels of the high level trigger (HLT) are software...
Prof.
Brian Foster
(University of Oxford)
24/07/2010, 11:25
The ILC is unique in particle physics in not having a "host" laboratory and in being fully international from the outset. Studies over the last two years have gathered data from other major projects of a similar size in order to learn lessons and formulate suggestions for how an ILC project can best be realised and managed. The current report is interim and is intended to engage with funding...
Cheng-Chin Chiang
(National Taiwan University)
24/07/2010, 11:30
We have performed a search for the decay B --> X_s l^+l^- using a pseudo-inclusive reconstruction technique. Using a data sample of 657 x 10^6 BB pairs, we observe a clear signal, including 238.3 +- 26.4 +- 2.3 events in the mass region M(X_s) < 2.0 GeV/c^2. The measured branching fraction is BR(B -> X_s l l) = (3.33 +- 0.80(stat) ^{+0.19}_{-0.24} (syst))x 10^{-6}; this result is restricted to...
Dr
Cheng-Ju Lin
(Lawrence Berkeley National Lab)
24/07/2010, 11:30
The last unknown neutrino mixing angle theta_13 is one of the fundamental parameters of nature; it is also a crucial parameter for determining the sensitivity of future long-baseline experiments aimed to study CP violation in the neutrino sector. Daya Bay is a reactor neutrino oscillation experiment designed to achieve a sensitivity on the value of sin^2(2theta_13) to better than 0.01 at 90%...
Herbert Rohringer
(Institut fuer Hochenergiephysik (HEPHY) - Oesterreichische Akad.)
24/07/2010, 11:35
13 - Advances in Instrumentation and Computing for HEP
Parallel Session Talk
We describe the functionality of the hardware based CMS L1 trigger system, which uses special trigger data from our Muon system, the Electromagnetic and Hadronic calorimeters for triggering on jets, electron/gammas and muons, total transverse and missing energy. With these "triggerobjects" complex algorithms can be built, which run simultaneously in the hardware, can be grouped together and...
Dr
Paolo Lodone
(Scuola Normale Superiore of Pisa)
24/07/2010, 11:40
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
It has been shown that, in the context of the MSSM, the Supersymmetric Flavour Problem cannot be solved by just letting the sfermions of the first two generations be relatively heavy. The reason is twofold: naturalness of the Fermi scale on one side, need for positive squared stop masses on the other.
The situation is much more promising in models without a light Higgs boson, in which the...
Jean-Francois Glicenstein
(CEA)
24/07/2010, 11:40
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
The H.E.S.S. experiment is an array of four identical imaging atmospheric Cherenkov telescopes in the Southern hemisphere, designed to observe very high energy gamma-rays (E $>$ 100 GeV). The annihilation of dark matter particles in large mass density astrophysical objects could produce detectable very high energy gamma-rays. The HESS collaboration has searched for a dark matter annihilation...
Dr
Paolo Bartalini
(NTU)
24/07/2010, 11:40
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
Studies of the underlying event and forward processes are important tests of the standard model and inputs for Monte Carlo tuning. By selecting regions transverse and parallel to the hard parton-parton scatter, different aspects of non-peturbative QCD are enhanced and allow fine tuning of different Monte Carlo models. The underlying event in pp interactions, recorded by the CMS detector, is...
258.
Sensitivity Enhancement for the Searches of Neutrino Magnetic Moments through Atomic Ionization
Hau-Bin Li
(Academia Sinica)
24/07/2010, 11:45
A new detection channel on atomic ionization for possible neutrino electromagnetic interactions was identified and studied. Orders of magnitude enhancement in sensitivities can be expected when the energy transfer to the target is of the atomic-transition scale.
Interaction cross-section induced by neutrino magnetic moments (mu_nu) was evaluated. New upper limit of mu_nu < 1.3×10^{-11} μ_B...
Kevin Flood
(University of Wisconsin)
24/07/2010, 11:45
We use the full Upsilon(4S) dataset collected with the Babar detector at the PEP-II asymmetric e+e- storage ring to study the flavor-changing neutral current decays. In particular, we present new results on B --> K*l+l-, where l+l- is either e+e- or mu+mu- the lepton forward-backward asymmetry AFB and K* longitudinal polarization fraction FL are measured, along with other angular observables....
Flavio Archilli
(University of Rome Tor Vergata)
24/07/2010, 11:50
13 - Advances in Instrumentation and Computing for HEP
Parallel Session Talk
The KLOE experiment at the DAFNE e+e- collider of the Frascati Laboratories of INFN is going to start a second data-taking campaign (KLOE-2). The detector has been upgraded with small angle electron taggers, while the insertion near the interaction point of an inner tracker is planned for the next year. The interaction region of DAFNE has been modified using a crabbed waist scheme. It has been...
Oscar Adriani
(INFN Firenze)
24/07/2010, 12:00
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
Data on antiproton, proton, positron, electron cosmic rays between tens MeV and hundreds GeV have been obtained in four years in flight by the PAMELA experiment. The results have been theoretically studied in an extensive way as dark matter annihilation signals, as well as pulsar contributions and new mechanisms of acceleration and propagation of cosmic rays in the Galaxy. The instrument...
Dr
Viacheslav Egorov
(JINR)
24/07/2010, 12:00
The laboratory neutrino magnetic moment (NMM) measurement is based on its contribution to the neutrino scattering on free electron (FE) or on an atom [1] via its ionization (AI). In both cases the observable is the recoil electron energy, the sensitivity increases with lowering the detection threshold.
In our experiment GEMMA[2] we use HPGe detector of 1.5 kg placed under the standard 3 GWth...
Tobias Hurth
(CERN/Mainz Univ.)
24/07/2010, 12:00
We present a complete method to construct QCD-protected observables based on the exclusive 4-body B-meson decay B --> K^* l^+ l^- in the low dilepton mass region. The core of the method is the requirement that the constructed quantities should fulfil the symmetries of the angular distribution. We have identified all symmetries of the angular distribution in the limit of massless leptons...
Eva Halkiadakis
(Dept. of Physics and Astronomy-Rutgers, State Univ. of New Jerse)
24/07/2010, 12:00
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
The production of chargino-neutralino pairs and their subsequent leptonic decays is one of the most promising supersymmetry (SUSY) signatures at the Tevatron proton-antiproton collider. We present here the most recent results on searches for the three-lepton and missing-transverse-energy SUSY signature using data collected at the Tevatron. The results are interpreted within the minimal...
1188.
Underlying Event studies and Monte Carlo tunes for inelastic pp events with the ATLAS detector
Emily Nurse
(FNAL)
24/07/2010, 12:05
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
Studies of the momentum flow in inelastic collisions at 900 GeV and 7 TeV recorded with a minimum bias trigger strategy are reported. A single high pT track is selected, and the distribution of other tracks in the event is evaluated relative to this reference track. The evolution of the charged momentum flow in the rest of the event, as a function of the pT of the reference track, gives...
Andrew Laing
(University of Glasgow)
24/07/2010, 12:10
13 - Advances in Instrumentation and Computing for HEP
Parallel Session Talk
The Neutrino Factory is the most powerful of the proposed facilities to search for CP violation in the lepton sector via neutrino oscillations. It delivers a well known beam of electron neutrinos and muon-antineutrinos from positive muon decay (electron-antineutrinos and muon neutrinos from negative muon decay) produced in the straight sections of the storage rings in which the muons are...
Prof.
Satyanarayan Nandi
(Oklahoma State University)
24/07/2010, 12:15
We propose a new mechanism for generating small neutrino masses which predicts the relation m_neu *v4/M3, where v is the electroweak scale, rather than the conventional seesaw formula m_neu *v2/M. Such a mass relation is obtained via effective dimension seven operators LLHH(H†H)/M3, which arise when an isospin 3/2 Higgs multiplet PHI is introduced along with iso-triplet leptons. The masses of...
Himansu Sahoo
(University of Hawaii)
24/07/2010, 12:15
We report the first observation of the radiative decay B^0 --> phi K^0 gamma and new measurements of time-dependent CP-violation using a large data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^+e^- collider. These measurements are sensitive to right-handed currents
from new physics. We also report an updated measurement of the branching...
Esther Ferrer Ribas
(Laboratoire de l''Accelerateur Lineaire (LAL) (IN2P3) (LAL))
24/07/2010, 12:15
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
The status of the solar axion search with the CERN Axion Solar Telescope (CAST) will be discussed. Results from the first part of CAST phase II where the magnet bores were filled with 4He gas at variable pressure in order to scan ma up to 0.4 eV will be presented. From the absence of excess X-rays when the magnet was pointing to the Sun, we set a typical upper limit on the axion-photon...
Bruce Hoeneisen
(Universidad San Francisco de Quito)
24/07/2010, 13:50
We measure the charge asymmetry A of like-sign dimuon events in 6.1 fb^{-1} of p anti-p collisions recorded with the D0 detector at a center-of-mass energy sqrt{s} = 1.96 TeV at the Fermilab Tevatron collider. From A, we extract the like-sign dimuon charge asymmetry in semileptonic b-hadron decays:
A^b_{sl}= -0.00957 +- 0.00251(stat) +- 0.00146 (syst).
This result differs by 3.2 standard...
Prof.
Paul Kooijman
(Univ. of Amsterdam)
24/07/2010, 13:50
The technical design report of the KM3NeT neutrino detector has been published. In this talk we describe the main features of this future telescope . The detector will be located on the floor of the Mediterranean Sea and will have a total volume of about 8 km3. The point source sensitivity for sources near the Galactic Centre will be more than two orders of magnitude better than any other...
Dr
Chad Finley
(Stockholm University)
24/07/2010, 14:00
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
Observations spanning TeV gamma rays to EeV cosmic rays suggest that a correlated flux of neutrinos within this energy range should also exist. The principal mission of the IceCube Neutrino Observatory is to detect these high energy neutrinos and identify their sources. The leading candidates are objects long suspected of accelerating cosmic rays, including supernova remnants, active galactic...
Claudia Glasman
(DESY)
24/07/2010, 14:00
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
Jet Production in ep collisions is presented over the 3 orders of magnitude in Q² and a subsequent determination of alpha_s. A first measurement is presented of the charge asymmetry in the hadronic final state from the hard interaction in DIS neutral current scattering. The production of energetic photons produced at low scattering angles is studied in the DIS case. For the first time,...
Prof.
Eric D. Zimmerman
(University of Colorado)
24/07/2010, 14:00
T2K is a long-baseline neutrino oscillation experiment searching for oscillation of muon neutrinos into electron neutrinos and measurement of the mixing angle theta_13, a key unknown mixing parameter in the lepton sector. The experiment will also make precise measurements of the oscillation parameters Delta m^2_23 and theta_23 via muon neutrino disappearance.
The major components of T2K...
Robert Blair
(ANL (HEP Div.))
24/07/2010, 14:00
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
We present a variety of model-independent studies of final states involving photons in combination with other objects. These include charged leptons (including taus), jets (including b-tagged jets), additional photons, and missing energy. Several kinematic distributions are examined in each final state considered to search for discrepancies from the standard model. One of the final states...
Ms
Flor de Maria Blaszczyk
(CEA / Irfu / SPP)
24/07/2010, 14:00
13 - Advances in Instrumentation and Computing for HEP
Parallel Session Talk
Tokai to Kamioka (T2K) is a new generation neutrino oscillation experiment that started collecting data in 2009 in Japan. A νμ beam produced by an intense proton beam colliding onto a target is directed from J-PARC (Tokai) to the 50kt water Cerenkov detector Super Kamiokande at a distance of 295 km. T2K’s main goals are measuring one of the last unknown parameters of the PMNS matrix θ13 by...
Marcello Giorgi
(INFN& Universita' di Pisa)
24/07/2010, 14:05
SuperB is a project to build in Italy a high luminosity (Peak Luminosity> 10^36) asymmetric e+ e- collider to study flavour physics in the present decade with the goal of disovery New Physycs beyond Standard Model.One of the beams will be longitudinally polarized (P>80%) and the machine can be operated at open charm threshold.
Beauty and Charm rare decays can be studied in five years run with...
Gilad Perez
(Weizmann Institute)
24/07/2010, 14:10
The D0 Collaboration reported a 3.2sigma deviation from the standard model prediction in the like-sign dimuon asymmetry. Assuming that new physics contributes only to B_{d,s} mixing, we show that the data can be analyzed without using the theoretical calculation of \Delta\Gamma_s, allowing for robust interpretations. We find that this framework gives a good fit to all measurements, including...
Dr
Pasquale Migliozzi
(Istituto Nazionale di Fisica Nucleare (INFN))
24/07/2010, 14:20
The OPERA long-baseline neutrino experiment is a hybrid electronic-emulsion experiment located in the underground INFN-LNGS Laboratory in central Italy. Its main goal is to observe nu-mu → nu-tau oscillations in appearance mode in the CNGS nu-mu beam from CERN to Gran Sasso. The electronic detectors yielded information on the neutrino beam and localized where an interaction took place. Runs...
Marco Adinolfi
(University of Bristol)
24/07/2010, 14:20
13 - Advances in Instrumentation and Computing for HEP
Parallel Session Talk
After several years of experience with Grid production and Analysis dealing with simulated data, the first LHC collision data (as of March 2010) have confronted the LHCb Computing Model with real data. The LHCb Computing Model is somewhat different from the traditional MONARC hierarchical model used by the other LHC experiments: first pass reconstruction, as well as further reprocessings, are...
Prof.
Maurizio Spurio
(University of Bologna and INFN)
24/07/2010, 14:20
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
The ANTARES high-energy neutrino telescope is a three-dimensional array of 885 photomultipliers distributed over 12 lines, installed deep in the Mediterranean Sea and completed in May 2008. The detector is optimized for the detection of muon neutrinos in an energy range from a few hundred GeV up to 1 PeV. The main goal of the experiment is to probe the Universe by means of neutrino events in...
Greg Landsberg
(Brown University)
24/07/2010, 14:20
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
We propose that the effective dimensionality of the space we live in depends on the length scale we are probing. As the length scale increases, new dimensions open up. At short scales the space is lower dimensional; at the intermediate scales the space is three-dimensional; and at large scales, the space is effectively higher dimensional. This setup allows for some fundamental problems in...
Royon Christophe
(DAPNIA)
24/07/2010, 14:30
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
We report on different measurements of jet differential cross section and properties obtained from the analysis of ppbar collisions at the Fermilab Tevatron Collider using data collected by the CDF and D0 experiments. The inclusive jet production cross section is measured with two different jet clustering algorithms, compared with next-to-leading order perturbative predictions using the most...
Gavril Giurgiu
(Johns Hopkins)
24/07/2010, 14:30
CDF presents improved bounds on the CP-violating phase beta_s and on the decay-width difference DeltaGamma_s of the neutral B0_s meson system. We use 6500 B0_s --> J/psi phi decays collected by the dimuon trigger and reconstructed in a sample corresponding to 5.2 fb^{-1} of data. Besides exploiting a two-fold increase in statistics with respect to the previous measurement, several improvements...
Prof.
Masako Iwasaki
(KEK)
24/07/2010, 14:30
For the next generation B-factory experiment in Japan, SuperKEKB, the high luminosity e+e- asymmetric collider at the B mesons CM energy, is planed as an upgrade of the current KEKB.
It is designed to achieve a luminosity of 8x10^35 /cm^2/s, 40 times higher than the highest luminosity record at KEKB.
A summary of the current machine deign and R&D status will be presented.
Prof.
Dejan Stojkovic
(SUNY at Buffalo)
24/07/2010, 14:40
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
Stellar evolution from a protostar to neutron star is of one of the best studied subjects in modern astrophysics. Yet, it appears that there is still a lot to learn about the extreme conditions where the fundamental particle physics meets strong gravity regime. After all of the thermonuclear fuel is spent, and after the supernova explosion, but before the remaining mass crosses its own...
Francisco Del Aguila
(Facultad de Fisica)
24/07/2010, 14:40
Neutrino oscillations can be explained introducing Dirac or/and Majorana neutrino masses and the corresponding charged current mixing matrix. Neither of them can be directly measured at large colliders, but their generating mechanism and/or new neutrino interactions can be unveiled at LHC if they are mediated by new particles at the TeV scale.
Gianluca Cerminara
(CERN)
24/07/2010, 14:40
13 - Advances in Instrumentation and Computing for HEP
Parallel Session Talk
The CMS detector, now taking data at the LHC in Geneva, is a very complex apparatus with more than 70 million acquisition channels. To exploit its full physics potential, a very careful calibration of the various components (crystal, drift tubes, silicon devices) and their attached electronics, together with an optimal knowledge of them in 3D space, is absolutely needed. The CMS Collaboration...
Gerald Grenier
(IPN Lyon)
24/07/2010, 14:40
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
Leptoquarks arise naturally in all models of unification of leptons and quarks, and might have masses close to the electroweak scale. In this case, to avoid flavor- changing neutral currents, leptoquarks cannot mix generations and separate searches are performed in separate final states for first, second and third generation leptoquarks. Technicolor models postulate the existence of new...
Rick Van Kooten
(Physics Department-Indiana University)
24/07/2010, 14:45
We have performed searches for CP violation in the B0_s system using data samples with 5-6.8 fb^{-1} of proton-antiproton collisions collected with the D0 detector in Run II at the Fermilab Tevatron. We discuss results from a search in a sample of B0_s -->mu^+D^-_sX decays, where CP violation effects appear as a difference in the decay-time distribution for B0_s --> anti-B0_s oscillated states...
Prof.
David Hanna
(McGill University)
24/07/2010, 14:55
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
VERITAS (Very Energetic Radiation Imaging Telescope Array System) is an array of four 12-m atmospheric Cherenkov telescopes located near Tucson, Arizona, USA. It is sensitive to astrophysical gamma rays at energies above 100 GeV. Since becoming fully operational in September 2007, VERITAS has detected a variety of sources, including active galactic nuclei, pulsar wind nebulae, and supernova...
Dr
Grigory Trubnikov
(Joint Institute for Nuclear Research, Dubna)
24/07/2010, 14:55
New project - heavy ion collider facility NICA/MPD (Nuclotron-based Ion Collider fAcility + MultyPurpose Detector) is under active development now at JINR (Dubna).
The general goal of the project is to start in the coming 5 years experimental study of hot and dense strongly interacting baryonic matter and search for possible signs of the mixed phase and critical endpoint in heavy ion...
Sandro Bravar
(Section de Physique - Univ. de Genève)
24/07/2010, 15:00
As neutrino long baseline experiments enter a new domain of precision, important systematic errors due to poor knowledge of production cross sections for pions and kaons require more precise measurements. Among other goals, the NA61/SHINE (SHINE SPS Heavy Ion and Neutrino Experiment) experiment at the CERN SPS aims at precision (5% and below) measurements to improve the prediction of the...
Prof.
Benjamin Grinstein
(University of California San Diego and CERN)
24/07/2010, 15:00
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
In little higgs models a collective symmetry prevents the higgs from acquiring a quadratically divergent mass at one loop. By considering first the littlest higgs model we show that this requires a fine tuning: the couplings in the model introduced to give the top quark a mass do not naturally respect the collective symmetry. We show the problem is generic: it arises from the fact that the...
Tancredi Carli
(CERN)
24/07/2010, 15:00
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
Making use of the excellent calorimetry of the ATLAS experiment, the first measurement of the cross-section for inclusive single-jet and di-jet production in proton-proton interactions at sqrt(s) = 7 TeV will be presented. The corrected and unfolded spectrum for high-pT jets in pp collision at a center-of-mass energy of 7 TeV will be described. Special emphasis will be given to the discussion...
Peter Onyisi
(University of Chicago)
24/07/2010, 15:00
13 - Advances in Instrumentation and Computing for HEP
Parallel Session Talk
The ATLAS experiment at the LHC started to accumulate 7TeV pp collisions data early in 2010. We shall report on the operations of the detector, discussing e.g. details of the detector status, the data acquisition efficiency with beam, the online measurement of the LHC luminosity. The online monitoring and data quality assessment will be described.
Prof.
Sheldon Stone
(Syracuse University)
24/07/2010, 15:00
The CP Violating asymmetry in Bs mixing (beta_s) is one of the most promising measurements where physics beyond the Standard Model could be revealed. Currently, such measurements are only a 5% likely to be consistent with SM expectations [1]. While this is not yet a significant deviation it does imply that such measurements should be subject to great scrutiny. The mode Bs -> J/psi phi has...
Stefan Westerhoff
(University of Wisconsin-Madison)
24/07/2010, 15:15
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
Milagro, a water Cherenkov air shower detector located in the Jemez Mountains, operated from 2000 to 2008. With its wide field of view and nearly continuous operation, Milagro has shed new light on the TeV sky. As a gamma-ray detector, it has detected and monitored known sources such as the Crab Nebula and Markarian 421, and it has discovered TeV emission from a number of other sources. As...
Marco Rescigno
(Istituto Nazionale di Fisica Nucleare Sezione di Roma 1)
24/07/2010, 15:15
Quantities related to B decays that are strongly suppressed in the standard model may provide early indications of non-SM physics. CDF has the world's largest heavy flavor samples and can explore rare decays with unprecedented sensitivity. We present the first observation of B0_s --> phi mu+ mu- decays (the rarest B0_s decays observed), a measurement of forward-backward asymmetry in B0 --> K*...
Joshua Spitz
(Yale University)
24/07/2010, 15:15
Liquid Argon Time Projection Chamber (LArTPC) technology offers exceptional position resolution, total-absorption calorimetry, scalability, and efficient particle identification for neutrino detection. ArgoNeuT, a 170 liter LArTPC neutrino detector set in the NuMI beamline at Fermilab, has collected thousands of low energy (E_{nu} \approx 3 GeV) neutrino and anti-neutrino events in a wide...
Dr
Jochen Kaminski
(Bonn University)
24/07/2010, 15:20
13 - Advances in Instrumentation and Computing for HEP
Parallel Session Talk
Micro-pattern gas detectors are used for an increasingly wide range of detector applications in particle physics. Both GEM based detectors and Micromegas based detectors are being studied. Several new production techniques in particular for Micromegas detectors have recently been announced.
In this talk the state of the different technologies will be discussed, together with a review of their...
Luca Scodellaro
(Unknown)
24/07/2010, 15:20
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
We present two Tevatron search results for massive particles; the search for a massive quark (b') decaying to t quark and W boson and the search for the production of a massive W’ gauge boson that decays into a t and b quark. In the former, we use the scalar sum of the transverse energies and the number of jets present in the event to discriminate possible new quarks or other particles from...
Mikko Voutilainen
(CERN)
24/07/2010, 15:20
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
We report on an extensive list of analyses in order to test QCD predictions for jet production in pp collisions at sqrt(s)=7 TeV, recorded by the CMS experiment. The list includes a measurement of the inclusive jet spectra, obtained with different jet reconstruction methods, the ratio of the inclusive three-jet over two-jet cross sections as a function of the total jet transverse momentum HT,...
Prof.
Max Klein
(University of Liverpool)
24/07/2010, 15:20
Under the auspices of CERN, ECFA and NuPECC, a Conceptual Design Report is being prepared on the physics, detector and accelerator for an ep/eA collider, which by adding an O(60) GeV energy electron beam to the proton/ion beams of the LHC, will open a path to high mass and lowest Bjorken x explorations of polarised electron/positron-quark/gluon interactions at TeV energies. The LHeC will...
Giovanni Marsella
(Università del Salento and INFN Lecce)
24/07/2010, 15:30
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
The ARGO-YBJ experiment, installed at the Yangbajing Cosmic Ray Laboratory (Tibet, China), at 4300 m a.s.l., is a detector 100x110m^2 large, made by a layer of Resistive Plate Counters (RPCs) consisting of a central carpet with almost full coverage extending over an area of about 5.500 m^2, surrounded by a guard ring with partial coverage. The high space-time granularity, the full-coverage...
Prof.
Arie Bodek
(University of Rochester)
24/07/2010, 15:30
We present unpdate to the Bodek-Yang model for inelastic neutrino- and electron-nucleon scattering cross sections using effective leading order parton distribution functions with a new scaling variable \xi_w.
Non-perturbative effects are well described using the \xi_w scaling variable, in combination with multiplicative K factors at low Q^2 for Q^2 < 1 GeV^2.
Our model desribes all...
Matthias Neubert
(Johannes Gutenberg University Mainz)
24/07/2010, 16:05
A comprehensive analysis of tree-level weak interaction processes at low energy is presented for different implementations of the Randall-Sundrum model with gauge and matter fields in the bulk and brane-localized Higgs sector. The complete form of the effective weak Hamiltonian is obtained, which results from tree-level exchange of Kaluza-Klein (KK) gluons and photons, the W and Z bosons and...
Prof.
Martin Pohl
(Université de Genève)
24/07/2010, 16:15
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
I review the present experimental situation of high energy cosmic rays, in the GeV to multi-TeV region. Performance of existing instruments, spectrum and composition measurements are presented. Future instruments and their expected contributions to questions like cosmic ray origin, acceleration and propagation, as well as non-standard sources like dark matter are commented on.
Dr
Justin Evans
(University College London)
24/07/2010, 16:15
The MINOS experiment utilizes the NuMI neutrino beam to study the phenomenon of neutrino oscillations. Neutrinos are sent over a baseline of 735 km, with a detector near the production point at Fermilab and one at the Soudan underground laboratory in northern Minnesota. By observing the neutrino disappearance characteristic of oscillations, MINOS can measure the oscillation parameters. MINOS...
Dr
Silvia Amerio
(INFN Padova)
24/07/2010, 16:15
13 - Advances in Instrumentation and Computing for HEP
Parallel Session Talk
Real time event reconstruction plays a fundamental role in High Energy Physics experiments. Reducing the rate of data to be saved on tape from millions to hundreds per second is critical. In order to increase the purity of the collected samples, rate reduction has to be coupled with the capability to simultaneously perform a first selection of the most interesting events. A fast and efficient...
Bob Tschirhart
(Fermilab)
24/07/2010, 16:15
Fermilab is leading an international consortium to develop the design of “Project-X” which is an accelerator complex based on a new H- linac that will drive a broad range of experiments at the Intensity Frontier. Project X will provide multi-MW beams from the Main Injector over the energy range 60-120 GeV, simultaneous with mult-MW beams at 3 GeV. The Project-X research program includes...
Yunhe Xie
(Fermilab)
24/07/2010, 16:15
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
New physics can present itself in many different ways, in some scenarios, some of the postulated new particles can have a lifetime that allows them to escape typical particle detectors before decaying. In others, potential new particles with relatively light masses are hypothesized to exist in a “potential valley” separated from the SM by a high potential barrier. Yet a third postulate are...
David Kosower
24/07/2010, 16:15
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
We compute the NLO QCD corrections for the production of a weak vector boson (W or Z) in association with up to three jets at the LHC, using the programs BlackHat and SHERPA. We study total cross sections as well as distributions. We discuss W polarization phenomena. We also present a study of ratios between related processes, which could enable data-driven background estimations,...
Dr
Nazila Mahmoudi
(LPC Clermont-Ferrand)
24/07/2010, 16:20
The interplay of flavor and collider physics is entering a new era with the start-up of the LHC. During the past few years rare B decays and in particular b -> s gamma transitions have been extensively used and provided exciting opportunities for mapping possible routes beyond the SM. Flavor constraints play in this manner a complementary role to the direct searches.
In this talk, I will...
Andreas Korn
(Lawrence Berkeley National Laboratory (LBNL))
24/07/2010, 16:34
ATLAS has a rich charmonium and beauty physics programme. After a few pb-1 of 7 TeV collision data have been taken at the LHC, ATLAS will be able to start probing the new energy regime with decays of the psi and Upsilon families of mesons into pairs of muons. In addition to the physics aspects of the charm resonances, they are also an important tool for understanding the performance of the...
Marc Winter
(Institut Pluridisciplinaire Hubert Curien)
24/07/2010, 16:35
13 - Advances in Instrumentation and Computing for HEP
Parallel Session Talk
CMOS pixel sensors have demonstrated attractive performances in terms of spatial resolution and material budget. The recent emergence of high resistivity substrates in mass production CMOS processes has originated particularly high signal-to-noise ratios and improved the non-ionising radiation tolerance to fluences close to 10^14 Neq/cm^2. These achievements, obtained with MIMOSA sensors...
Prof.
Mu-Chun Chen
(University of California at Irvine)
24/07/2010, 16:35
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
We propose a Minimal Supersymmetric Standard Model combined with a non-universal, non-anomalous U(1)' symmetry. All anomalies are cancelled in the model without any exotic fields other than the three right-handed neutrinos which are needed to generate neutrino masses. The D-term associated with the U(1)' gives rise to additional contributions to the slepton masses, rendering all slepton masses...
pierre sokolsky
(university of Utah)
24/07/2010, 16:35
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
The High Resolution Fly's Eye (HiRes) experiment studied ultrahigh energy cosmic rays using the fluorescence technique. HiRes had two fluorescence sites located atop desert mountains in west-central Utah, and ran from 1997-2006. Results from the complete HiRes data set will be presented, on the spectrum, composition, and anisotropy of cosmic rays.
Prof.
Ken Long
(Imperial College London)
24/07/2010, 16:40
The International Design Study for the Neutrino Factory (the IDS-NF) has been established by the Neutrino Factory community to deliver the Reference Design Report (RDR) for the facility by the 2012/13 decision point identified by the Strategy Session of CERN Council. The baseline design for the facility will provide 10^21 muon decays per year from 25 GeV stored muon beams. The facility will...
Ferruccio Feruglio
(Dipartimento di Fisica Galileo Galilei)
24/07/2010, 16:40
Neutrino oscillations represent the first, and so far unique, evidence for the incompleteness of the Standard Model (SM) of particle interactions.
After summarizing the main theoretical questions raised by the discovery of neutrino oscillations, theoretical concepts and ideas leading to extensions of the SM compatible with the present experimental data will be reviewed. Possible tests of some...
Dr
Avto Kharchilava
(SUNY at Buffalo)
24/07/2010, 16:40
03 - Perturbative QCD, Jets and Diffractive Physics
Parallel Session Talk
We present several measurements of the differential cross sections for W and Z bosons produced in association with jet(s), using data samples corresponding to integrated luminosities between 1 and 5.4/fb of ppbar collisions collected with the D0 detector. We present differential cross section measurements for Z/gamma*+jet+X relative to the Z\gamma* transverse momentum, relative to the leading...
Andy Nelson
(Iowa State University)
24/07/2010, 16:47
ATLAS has a rich charmonium and beauty physics programme. After a few pb-1 of 7 TeV collision data have been taken at the LHC, ATLAS will be able to start probing the new energy regime with decays of the psi and Upsilon families of mesons into pairs of muons. The very first physics measurement, possible with less than 1 pb-1 of data, is the fraction of J/psi mesons produced in B-hadron decays....
Gordon Thomson
(University of Utah)
24/07/2010, 16:55
11 - Particle Astrophysics and Cosmology
Parallel Session Talk
The Telescope Array (TA) Experiment is a hybrid experiment located in west-central Utah that studies ultrahigh energy cosmic rays. The TA experiment has a surface detector of 507 scintillation counters deployed on a 1.2 km grid, and three fluorescence detector stations arranged around the surface detector which overlook it. TA is the largest cosmic ray detector in the northern hemisphere. ...
Dr
Pierre Lutz
(CEA Orsay)
24/07/2010, 16:55
10 - Beyond the Standard Model (theory and experimental searches)
Parallel Session Talk
We present a variety of model-independent studies of final states involving photons in combination with other objects. These include charged leptons (including taus), jets (including b-tagged jets), additional photons, and missing energy. Several kinematic distributions are examined in each final state considered to search for discrepancies from the standard model. One of the final states...