Prof.
Max Klein
(University of Liverpool (UK))
06/07/2012, 09:00
Track 9. Heavy Ion Collisions
Parallel Sessions
Direct production of bosons are a powerful tool in heavy ion collisions. Their rates provide access to the initial state parton distribution functions, which are expected to be modified by nuclear effects. ย They also provide a means to calibrate the expected energy of jets that are produced in the medium, and thus are a tool to probe the physics of jet quenching more precisely both through jet...
Prof.
Erez Etzion
(Tel Aviv University (IL) & CERN (CH))
06/07/2012, 09:15
Track 9. Heavy Ion Collisions
Parallel Sessions
Jet quenching in the hot and dense medium created in ultra-relativistic heavy ion collisions is a well-established experimental phenomenon at RHIC. It has long been anticipated that the LHC heavy ion program would substantially advance the study of jet quenching by providing access to highly energetic jets and by measuring fully-reconstructed jets. Immediately following turn-on of the LHC in...
Dr
Jean-Philippe Lansberg
(Institut de Physique Nuclรฉaire d'Orsay / IN2P3-CNRS (FR)),
Jean-Philippe Lansberg
(IPN Orsay, Paris Sud U. / IN2P3-CNRS),
Jean-Philippe Lansberg
(Ecole polytechnique),
Jean-Philippe Lansberg
(Ecole Polytechnique)
06/07/2012, 09:30
Track 9. Heavy Ion Collisions
Parallel Sessions
We will discuss the nuclear-matter effects on J/Psi and Upsilon production at RHIC and the LHC in proton-nucleus and, by extension, in nucleus-nucleus collisions. In the Upsilon case, we will argue that (i) the Upsilon break-up probability can be neglected in a first approximation, (ii) the gluon shadowing and antishadowing are not strong enough to describe forward RHIC data, (iii) the...
Dr
Andrea Dainese
(INFN Padova (IT))
06/07/2012, 09:45
Track 9. Heavy Ion Collisions
Parallel Sessions
The ALICE experiment studies nucleus-nucleus collisions at the LHC in order to investigate the properties of QCD matter at extreme energy densities. The measurement of open charm and open beauty production allows to probe the mechanisms of heavy-quark propagation, energy loss and hadronization in the hot and dense medium formed in high-energy nucleus-nucleus collisions. In particular,...
Dr
Nuno Viegas Guerreiro Leonardo
(Purdue University (US))
06/07/2012, 10:00
Track 9. Heavy Ion Collisions
Parallel Sessions
The Compact Muon Solenoid (CMS) is fully equipped to measure hard probes in the di-muon decay channel in the high multiplicity environment of nucleus-nucleus collisions. Such probes are especially relevant for studying the quark-gluon plasma since they are produced at early times and propagate through the medium, mapping its evolution. CMS has measured the nuclear modification factors of...
Dr
David Krofcheck
(University of Auckland (NZ))
06/07/2012, 10:15
Track 9. Heavy Ion Collisions
Parallel Sessions
Jet production in PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV is studied with the CMS detector at the LHC. Jets are reconstructed using the energy deposited in the CMS calorimeters. A large dijet imbalance is observed in central PbPb collisions, which reduces in the more peripheral collisions. This observation is consistent with a jet quenching scenario, where the...
Prof.
Ehud Duchovni
(Weizmann Institute of Science (IL))
06/07/2012, 11:00
Track 9. Heavy Ion Collisions
Parallel Sessions
This talk will present the results of the azimuthal anisotropy of charged particle production and two particle correlations ย in Pb + Pb collisions measured with the ATLAS experiment. The results are obtained with multi-particle correlations and compared with the event plane method. A complete set of v_n harmonics measured from central to peripheral events covers a pseudo-rapidity range of...
Prof.
Leif Ingvar Lรถnnblad
(Lund University (SE))
06/07/2012, 11:15
Track 9. Heavy Ion Collisions
Parallel Sessions
We present a new Monte Carlo event generator based on the Mueller dipole model. The model is equivalent to leading logarithmic BFKL evolution and in our implementation we include several non-leading effects, such as energy-momentum conservation and a so-called swing mechanism to model saturation effects. In the end we can model all kinds of correlations and fluctuations between partons in the...
Ms
Francesca Bellini
(Universita e INFN & University of Bologna (IT))
06/07/2012, 11:30
Track 9. Heavy Ion Collisions
Parallel Sessions
The ALICE experiment can benefit from its excellent particle identification capabilities to study hadron production in Pb-Pb collisions at \sqrt(s_NN) = 2.76 TeV, over a wide range of momenta. This allows one to probe different stages of the medium evolution. Transverse momentum spectra of identified particle and resonances characterize the bulk freeze-out properties and the dynamical...
Dr
Sandra Padula
(UNESP - Universidade Estadual Paulista (BR))
06/07/2012, 11:45
Track 9. Heavy Ion Collisions
Parallel Sessions
We report on the CMS measurements of charged hadron anisotropic azimuthal distributions from PbPb collisions at sqrt{s_{NN}} = 2.76 TeV. The results are presented as a function of transverse momentum, centrality and pseudorapidity and cover a broad kinematic range. Long range in pseudorapidity di-hadron azimuthal correlations are also studied and discussed in terms of the possible influence of...
Ms
Anitha Nyatha
(Indian Institute of Technology Bombay (IN))
06/07/2012, 12:00
Track 9. Heavy Ion Collisions
Parallel Sessions
Anisotropic flow is sensitive to the properties of the deconfined state of matter produced during the course of a heavy-ion collision. We report on the inclusive photons anisotropic flow at forward rapidity, 2.3 < eta < 3.9, measured for Pb-Pb collisions at 2.76 TeV with ALICE at the LHC. Photons are reconstructed with ALICE Photon Multiplicity Detector (PMD), and the collision symmetry plane...
Mr
Carlos Eugenio Perez Lara
(NIKHEF (NL))
06/07/2012, 12:15
Track 9. Heavy Ion Collisions
Parallel Sessions
The ALICE experiment studies Pb-Pb collisions at the LHC in order to investigate the properties of the hot and dense QCD matter at extreme energy densities. Recent results from ALICE in identified particle flow allow for the exploration of the collective properties of the medium created in heavy-ion collisions. Due to their difference in mass, the strange and charm quarks are expected to...
Prof.
Vladimir Kekelidze
(Joint Institute for Nuclear Research (RU))
06/07/2012, 12:30
Track 9. Heavy Ion Collisions
Parallel Sessions
Scientific program of NICA (Nuclotron-based Ion Collider fAcility) is now under realization phase at JINR (Dubna). The main goal of the program is an experimental study of hot and dense strongly interacting matter in heavy ion collisions at centre-of-mass energies of โsNN = 4-11 GeV (NN-equivalent) and at average luminosity of 10E27 cm-2 s-1 for Au (79+) in the collider mode (NICA collider)....
Dr
Silvestro Di Luise
(Eidgenoessische Tech. Hochschule Zรผrich (CH))
06/07/2012, 12:45
Track 9. Heavy Ion Collisions
Parallel Sessions
The NA61/SHINE (SPS Heavy Ion and Neutrino Experiment) is a fixed-target experiment to study hadron production in hadron-nucleus and nucleus-nucleus
collisions at the CERN SPS.
The experimental apparatus is a large acceptance Magnetic Spectrometer complemented with Time-Of-Flight detectors and a Projectile Spectator Detector. Its excellent capability for particle identification and...
Prof.
Paul Newman
(University of Birmingham (UK))
06/07/2012, 13:00
Track 9. Heavy Ion Collisions
Parallel Sessions
The Large Hadron electron Collider (LHeC) is a proposed facility which will exploit the LHC heavy ion beam for electron-nucleus scattering, using a new 60 GeV electron accelerator. This contribution, which is derived from the detailed simulations in the recently released Conceptual Design report, addresses the expected physics impact of the LHeC for heavy ion physics and nuclear parton density...
Prof.
Fernando Barreiro
(Universidad Autonoma De Madrid (ES))
06/07/2012, 13:45
Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy
Parallel Sessions
We study the prospects of measuring the CKM matrix element $\vert V_{ts}\vert$ at the LHC with the top quarks produced in the processes $p p \to t\bar{t}X$ and $p p \to t/\bar{t} X$, and the subsequent decays $t \to W^+s$ and $\bar{t} \to W^- \bar{s}$. To reduce the jet activity in top quark decays, we insist on tagging the $W^\pm$ leptonically, $W^\pm \to \ell^\pm \nu_\ell$ ($\ell =e, \mu,...
Prof.
Gerald Eigen
(University of Bergen (NO))
06/07/2012, 14:00
Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy
Parallel Sessions
The inclusive decay b-->s gamma, which in the standard model proceeds via the electroweak penguin process, is sensitive to contributions from physics beyond the standard model. Extensive theoretical literature discusses the contributions of new physics to the decay rate and CP asymmetry. While predictions for the exclusive decays such as B-->K* gamma suffer from large hadronic uncertainties...
Mr
Florian Bernlochner
(University of Victoria (CA))
06/07/2012, 14:15
Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy
Parallel Sessions
The measurements of the total B->Xs gamma decay rate and the determination of the CKM matrix element |Vub| play important roles in looking for new physics in the flavor sector of the Standard Model, complementary to the ongoing direct searches at the LHC. Their measurements from present and future B-factory data require the precise knowledge of the nonperturbative parts of the parton...
Dr
Olivier Deschamps
(Laboratoire De Physique Corpusculaire (FR))
06/07/2012, 14:30
Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy
Parallel Sessions
Radiative B decays are sensitive probes of New Physics. We present the first results on these decays from the LHCb experiment, which are obtained with 1.0 fb-1 of proton-proton collision data collected in 2011. Results include the measurements of the branching fraction of B0s -> ฯ ฮณ and the CP asymmetry in B0 -> K*0 ฮณ.
Ms
Oksana Brovchenko
(KIT - Karlsruhe Institute of Technology (DE))
06/07/2012, 14:45
Track 5 - B-Physics
Parallel Sessions
The quark transition $b \rightarrow s \nu\bar{\nu}$ is only possible within the Standard Model (SM) through higher order processes, which are highly suppressed compared to tree-level processes. The theoretical predictions of the decays where this quark process occurs are very precise because there is only one hadron in the final state and no charged lepton. However, in models beyond the...
Mr
Keith Ulmer
(University of Colorado at Boulder (US))
06/07/2012, 15:00
Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy
Parallel Sessions
The rare decays B_s(B^0)->mu+mu-, B0->K*mu+mu- and D0->mu+mu- are excellent tests of the flavor sector of the Standard Model and are sensitive to new physics. We report on studies of these decays performed with the CMS experiment using pp collisions data collected in 2011 at a centre-of-mass energy of 7 TeV.
We present the first observation of the excited B baryon Xi_b* in the strong decays...
Dr
Abraham Antonio Gallas Torreira
(Universidade de Santiago de Compostela (ES))
06/07/2012, 15:15
Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy
Parallel Sessions
Rare b -> s ฮผ+ ฮผโ transitions that proceed via flavour changing neutral currents are suppressed in the SM and provide a sensitive probe of new physics contributions entering in competing diagrams. The dataset collected with the LHCb experiment has enabled measurements to be made in decays such as B0 -> K*0 ฮผ+ ฮผโ, B+ -> K+ ฮผ+ ฮผโ and B0s -> ฯ ฮผ+ ฮผโ. Particularly interesting are the angular and...
Dr
Hideki Miyake
(KEK (JP))
06/07/2012, 15:30
Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy
Parallel Sessions
Results of a CDF search for B->mumu decays and the angular analysis of B --> X_s mu+mu- decay sare presented using the complete 10/fb dataset collected by the CDF experiment. The B-> mu+mu-analysis is unchanged with respect to the last iteration and 30% more data allow to reach 95% expected upper limits for the branching ratio of4.2x10^-9 in the Bd decay and 1.3x10^-8 in the Bs decay. The...
Dr
Nazila Mahmoudi
(CERN (CH) & Clermont Ferrand University (FR))
06/07/2012, 16:00
Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy
Parallel Sessions
I will review flavour physics constraints on supersymmetric models and in particular those from b to s gamma, Bs to mu+ mu- and B to K* mu+mu- (with an emphasis on the new LHCb results). These rare transitions provide valuable information in the quest for new physics and are complementary to the direct searches. The SuperIso program will also be described.
Prof.
Vladimir Kekelidze
(Joint Inst. for Nuclear Research (RU))
06/07/2012, 16:15
Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy
Parallel Sessions
The NA62 (phase-I) experiment at CERN collected a large sample of charged kaon decays in 2007-2008, allowing one to study these decays with a high precision. The first result of the helicity-suppressed ratio RK of the K+- --> e+- nu and K+- --> mu+- nu decay measurement based on this sample is presented. The result is in agreement with the Standard Model expectation, and constrains...
Prof.
Mike Hildreth
(University of Notre Dame (US))
06/07/2012, 16:30
Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy
Parallel Sessions
Precision measurement of the ultra-rare $K^+\to\pi^+\nu \bar\nu$ decay at Fermilab would be one of the most incisive probes of quark flavor physics this decade. Its dramatic reach for uncovering new physics is due to several important factors: The branching ratio is sensitive to most new physics models which extend the Standard Model to solve its considerable problems. The Standard Model...
Dr
Steven Robertson
(McGill University (CA))
06/07/2012, 16:45
Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy
Parallel Sessions
Lepton-flavor violation in the standard model occurs only via neutrino mixing, and is thus suppressed by powers of (m_nu / m_W)^2 to far below observable levels. However, in many extensions of the standard model, lepton-flavor violation involving third-generation fermions may be highly enhanced. Study of B decays involving a tau lepton in the final state is complicated by the presence of...
Dr
Paolo Iengo
(INFN (IT))
06/07/2012, 17:00
Track 5 - B-Physics
Parallel Sessions
The search for the rare decay Bs to mu+ mu- with the ATLAS detector is discussed. Results form analysis of 2.4fb-1 of data collected in 2011 are presented. The production of B-mesons has been studied by ATLAS in several exclusive channels containing a ]/psi. Several analysis are discussed, including the recent observation of Bc -> ]/psi pi.
Mr
Mathieu Perrin-Terrin
(Centre de Physique des Particules de Marseille, Universitรฉ d'Aix-Marseille (FR))
06/07/2012, 17:15
Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy
Parallel Sessions
We present a review of the searches for very rare decays to muon final states performed at LHCb using 1.0 fbโ1 of pp collisions at 7 TeV centre of mass energy. Flavour changing neutral current processes, such as B0s -> ฮผ+ ฮผโ are highly suppressed in the Standard Model (SM). Such decays therefore allow the contributions from new processes or new heavy particles to significantly modify the...
Claudia Cecchi
(Universita e INFN (IT))
06/07/2012, 17:30
Track 7. CP Violation, CKM, Rare Decays, Meson Spectroscopy
Parallel Sessions
SuperB will collect 75ab^-1 of data at the Y(4S). Using this data, the experiment will be able to study rare B decays such as B to l nu and K(*)nu nubar as well as perform precision measurements of the angles of the unitarity triangle and improving measurements of |Vub| and |Vcb|. A few ab^-1 run at the Y(5S) will allow this experiment to search for rare decays of the B_s meson as well as...
Prof.
Mikhail Danilov
(ITEP Institute for Theoretical and Experimental Physics (RU))
06/07/2012, 17:45
Track 5 - B-Physics
Parallel Sessions
The B factories โ the Belle detector at the KEKB collider in KEK and the BaBar detector at the PEP II in SLAC โ have, in more than a decade of data taking, outreached the initial expectations on the physics results. They pointed out few hints of discrepancies between the Standard Model (SM) predictions and the results of the measurements. To experimentally verify the current hints of possible...
