Présidents de session
Ultrarelativistic Heavy Ions
- Jose Guilherme Milhano
Ultrarelativistic Heavy Ions
- Alexander Milov (Weizmann Institute of Science)
Ultrarelativistic Heavy Ions
- Boris Hippolyte (IPHC Strasburg)
Ultrarelativistic Heavy Ions
- Jorge Casalderrey Solana (CERN)
Dr
Helena Santos
(LIP)
21/07/2011 09:00
Parallel session talk
A wide research program provided by heavy ion collisions is ongoing at the Large Hadron Collider with the aim of studying the properties of QCD matter at extreme temperatures and densities. The large acceptance, high granularity and broad pseudorapidity coverage of the ATLAS Detector is well suited to perform detailed analyses on bulk phenomena, jets and leptonic probes. Measurements of these...
Yen-Jie Lee
(Massachusetts Institute of Technology)
21/07/2011 09:30
Parallel session talk
We will present results of the CMS experiment from PbPb collisions at $srqrt{s_{NN}}$ = 2.76 TeV, probing quark and gluon matter at unprecedented values of energy density. The CMS apparatus provides calorimetry, muon and tracking systems covering a large range in pseudorapidity, complemented by a flexible two-level trigger system. This allows us to study the production of jets, photons,...
Dr
Boris Hippolyte
(IPHC Strasburg)
21/07/2011 10:00
Parallel session talk
ALICE (A Large Ion Collider Experiment) is the LHC experiment specifically designed to study QCD matter under extreme conditions of temperature and pressure. The aim is to study the Quark-Gluon Plasma obtained with high energy nucleus-nucleus collisions and to characterize its properties. Results from the ALICE experiment for sqrt(s_NN)=2.76 TeV Pb-Pb collisions will be presented and compared...
Dr
Jose Guilherme Milhano
(CENTRA-IST, Lisbon & CERN PH-TH)
21/07/2011 11:00
Parallel session talk
The LHC offers unprecedented opportunities to study the jets produced in heavy ion collisions. The release of the first LHC heavy ion data on jets has been accompanied by a surge of related theoretical activity. These recent efforts have focused on the identification and development of necessary ingredients to promote and complement the existing theoretical formulations, originally developed...
Dr
Chris Pinkenburg
(BNL)
21/07/2011 11:30
Parallel session talk
The PHENIX Experiment at the Relativistic Heavy Ion Collider of the Brookhaven National Laboratory has been taking data for over 10 years. The accumulated data sets span multiple beam energies and collision systems that provide an increasingly detailed picture of the hot and dense medium produced in central heavy ion collisions. I will summarize our latest results and give an outlook of our...
Dr
Michael Mitrovski
(STAR Collaboration)
21/07/2011 12:00
Parallel session talk
For almost 30 years, hadron production in heavy ion collisions has been an important observable for probing the state of nuclear matter. Mapping out the phase diagram of strongly interacting matter is a challenging open task in quantum chromodynamics (QCD). The goal of the RHIC $Beam$ $Energy$ $Scan$ program (BES) is to study the phase diagram of strongly interacting matter to search for the...
M.
Francesco D'Eramo
(MIT)
21/07/2011 12:30
Parallel session talk
The propagation of hard partons through the strongly interacting matter
created in high energy heavy-ion collisions involves widely separated
scales. The methods of Effective Field Theories (EFT) can provide a
factorized description at lowest nontrivial order, and a formalism where
the correction to this factorization are calculable systematically order
by order in the small ratios...
Dr
Roman Planeta
(Institute of Physics Jagiellonian University)
21/07/2011 12:45
Parallel session talk
This presentation will summarize status and plans of the NA61/SHINE ion program.
The NA61/SHINE at the CERN SPS facility is the successor of the former NA49 experiment.
The study of central Pb+Pb collisions by NA49 indicate that the threshold for
deconfinement is reached already at the low SPS energies. Theoretical considerations predict
that SPS accelerator will cover one of the most...
Dr
Javier L. Albacete
(Universidade de Santiago de Compostela)
21/07/2011 14:30
Parallel session talk
I will present a brief review of the different approaches to the description of bulk particle production in heavy ion collisions at RHIC and the LHC, with emphasis in the Color Glass Condensate approach (CGC). In the CGC approach coherence effects are taken into account through non-linear QCD renormalization group equations and also in the use of semi-classical methods appropriate at high...
Dr
Panos Christakoglou
(NIKHEF)
21/07/2011 15:00
Parallel session talk
Fluctuations of thermodynamic quantities are fundamental for the study of the QGP phase transition. Among the several observables calculated on an event-by-event basis, the different measures of the charge and mean transverse momentum fluctuations are of particular interest since they are considered to be indicators of the existence and of the order of this transition as well as of the...
Dr
Robert Pak
(Brookhaven National Laboratory)
21/07/2011 15:15
Parallel session talk
Measurement of anisotropic particle production transverse to the beam direction, referred to as collective flow, has provided a powerful tool for characterizing ultrarelativistic heavy-ion collisions. We will present recent results on higher-order flow harmonics for different particle species at various Au+Au collision energies measured with the PHENIX experiment at the Relativistic Heavy Ion...
Dr
Michal Sumbera
(Nuclear Physics Institute ASCR)
21/07/2011 15:30
Parallel session talk
Three-dimensional source imaging techniques in conjunction with detailed model comparisons have shown the viability of disentangling the spatio-temporal information contained in two-pion interferometric
measurements from ultra-relativistic heavy ion collisions. This has led
to the observation of non-Gaussian tails in the 3D pion source function
and the extraction of finite pion emission...
Dr
Roberto Preghenella
(INFN Bologna)
21/07/2011 15:45
Parallel session talk
The measurement of identified charged hadron production at mid-rapidity (|y| < 0.5) performed with the ALICE experiment is resented for PbPb collisions at a nucleon-nucleon c.m. energy of 2.76 TeV. The transverse momentum spectra of charged pions, kaons, protons and antiprotons are measured from 200 MeV/c up to 3 GeV/c for pions and kaons and from 400 MeV/c up to 5 GeV/c for protons and...
Frank Ma
21/07/2011 16:30
Ultrarelativistic Heavy Ions
Parallel session talk
The energy loss of fast partons traversing the strongly interacting matter produced in high-energy nuclear collisions is one of the most interesting observables to probe the nature of the produced medium. The multipurpose Compact Muon Solenoid (CMS) detector is well designed to measure these hard scattering processes with its high resolution calorimeters and high precision silicon tracker....
Dr
Tzvetalina Stavreva
(LPSC)
21/07/2011 17:00
Parallel session talk
We present a detailed phenomenological study of the associated production of a prompt photon and a heavy quark jet (charm or bottom) in proton-nucleus (p-A) and nucleus-nucleus (A-A) collisions. The dominant contribution to the cross-section comes from the gluon--heavy-quark (gQ) initiated subprocess, making this process very sensitive to the gluon and the heavy-quark nuclear parton densities....
Dr
Diego Stocco
(Subatech)
21/07/2011 17:15
Parallel session talk
The ALICE experiment studies the properties of the QCD matter at the extreme energy densities of the ultra-relativistic heavy-ion collisions at the LHC. Produced on a very short time-scale in the initial hard-scattering processes, the heavy quarks (charm and beauty) experience the whole collision evolution: measuring the open heavy flavour spectra allows to investigate the mechanisms of...
M.
Christopher Powell
(Lawrence Berkeley National Laboratory)
21/07/2011 17:30
Parallel session talk
The production of quarkonium has been studied to provide information
about the hypothesized Quark Gluon Plasma (QGP) that is expected to be
created in relativistic heavy ion collisions at RHIC. Lattice QCD
predicts a suppression of quarkonium production in the presence of a hot
and dense medium relative to proton-proton collisions, with the
suppression pattern of the various quarkonium...
M.
Livio Bianchi
(INFN Torino - Universita' di Torino)
21/07/2011 17:45
Parallel session talk
ALICE is the experiment dedicated to heavy-ion studies at the LHC and, in particular, it aims at a comprehensive study of the hot and dense colour-deconfined state of matter called Quark-Gluon Plasma.
Quarkonia resonances are considered as powerful probes of the deconfined phase since the heavy quark pairs pairs are produced in the early stages of the collision and their bound states are very...
Mme
Catherine Silvestre
(LPSC, UIC, LANL (now LPSC, work done with UIC and LANL))
21/07/2011 18:00
Parallel session talk
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. Quarkonia and bottomonia are sensitive to the evolution of the medium. In particular,...
767.
Production of lepton, quark and meson pairs in peripheral ulrarelativistic heavy ion collisions
Prof.
Antoni Szczurek
(Rzeszow University and Institute of Nuclear Physics PAN)
21/07/2011 18:15
Parallel session talk
We discuss exclusive production of lepton-antilepton,
quark-antiquark, $\pi \pi$ and $\rho^0 \rho^0$ and $D \bar D$ meson
pairs in ultraperipheral, ultrarelativistic
heavy-ion collisions i.e. processes initiated by photon-photon
fusion which could be studied at RHIC and LHC.
The cross sections for exclusive muon pair production
in nucleus - nucleus collisions was calculated...
