Conveners
Quarks and gluons in hot and dense matter
- Stephane Munier (CPHT, Ecole polytechnique, CNRS)
Quarks and gluons in hot and dense matter
- Frithjof Karsch (Brookhaven National Laboraoty)
Quarks and gluons in hot and dense matter
- Ralf Ulrich (Karlsruhe Institute of Technology)
Quarks and gluons in hot and dense matter
- Matthew Lamont (Brookhaven National Lab)
Quarks and gluons in hot and dense matter
- Ralf Ulrich (Karlsruhe Institute of Technology)
Frithjof Karsch
(Brookhaven National Laboraoty)
25/08/2014, 14:00
1) Quarks and gluons in hot and dense matter
Talk
Fluctuations of conserved charges, i.e. baryon number, strangeness
and electric charge, are sensitive probes for the transition from
the confined hadronic to the deconfined partonic phase of strong
interaction matter. Rapid changes of, e.g. quadratic fluctuations
of net baryon number, net strangeness as well as correlations
between these conserved charges, signal the change of degrees...
Pedro Costa
(Coimbra University)
25/08/2014, 14:30
1) Quarks and gluons in hot and dense matter
Talk
Presently the study of the phase diagram of QCD is the subject of both theoretical and experimental studies under extreme conditions of density and temperature. In particular, it is expected that the phenomenon of deconfinement occurs in relativistic heavy-ion collisions and in the interior of compact stars, two very different scenarios when isospin asymmetry is considered. While in heavy ion...
Prof.
Fu-Ming LIU
(Central China Normal University)
25/08/2014, 14:50
1) Quarks and gluons in hot and dense matter
Talk
High energy photons have been measured in heavy ion collisions, at both RHIC and LHC. The direct photons, not from decay, carries a special information of the expanding system. This is studied with (3+1)-dimensional ideal hydrodynamics, constrained with a large collection of data of various hadrons. Thus a comparison between a realistic calculation and the photon data from both RHIC and LHC...
Dr
Akihiko Monnai
(RIKEN BNL Research Center)
25/08/2014, 15:20
1) Quarks and gluons in hot and dense matter
Talk
Heavy-ion collisions provide unique opportunities to explore the phenomenology of the quark-gluon plasma (QGP), a deconfined phase of QCD. The hot medium is considered to be a strongly-coupled system because the hadronic elliptic flow -- azimuthal anisotropy in momentum space -- is large and in quantitative agreement with the hydrodynamic models with very small viscosity. The elliptic flow of...
Dr
Petr Chaloupka
(Czech Technical University in Prague)
25/08/2014, 16:30
1) Quarks and gluons in hot and dense matter
Talk
Suppression of $J/\psi$ production in heavy-ion collisions due to color screening of quark and antiquark potential in the deconfined medium has been proposed as a signature of quark-gluon plasma (QGP) formation. However, there are other effects that may alter the observed $J/\psi$ yields, such as cold nuclear matter effects, and statistical coalescence of c-$\bar{\mathrm{c}}$ pairs. Indeed,...
Robert Vertesi
(Nuclear Physics Institute ASCR, Prague/Rez)
25/08/2014, 17:00
1) Quarks and gluons in hot and dense matter
Talk
Due to color screening, the production of quarkonia in high energy heavy ion collisions is expected to be sensitive to the energy density of the medium. Sequential suppression of different quarkonium states may therefore serve as a thermometer of the medium. Although the suppression of charmonia was anticipated as a key signature of the QGP, the observed energy dependence of $J/\psi$...
Dr
Grazia Luparello
(Universita' and INFN, Trieste)
25/08/2014, 17:30
1) Quarks and gluons in hot and dense matter
Talk
The primary goal of ALICE at the Large Hadron Collider (LHC) is to characterise the state of matter with partonic degrees of freedom, the Quark Gluon Plasma (QGP) produced in nucleus-nucleus collisions.
Heavy-quarks are considered efficient probes of the properties of the QGP since they are produced on a short time scale with respect to that of the QGP. Therefore, they are expected to...
Alexander Zinchenko
(Joint Institute for Nuclear Research, Dubna, Russia)
25/08/2014, 18:00
1) Quarks and gluons in hot and dense matter
Talk
The comprehensive heavy-ion program launched recently at JINR (Dubna) is
devoted to the study of the properties of strongly interacting matter, including a search for possible signals of deconfinement phase transition, chiral symmetry restoration and the QCD critical endpoint. The future accelerator facility NICA will supply ion species ranging from polarized proton to heavy ions with design...
Dr
Cyrille Marquet
(Ecole Polytechnique and CNRS)
26/08/2014, 14:00
1) Quarks and gluons in hot and dense matter
Talk
We study saturation effects in the production of forward dijets in proton-lead collisions at the LHC, using the framework of High Energy Factorization. Such congurations, with both jets produced in the forward direction, probe the gluon density of the lead nucleus at small longitudinal momentum fraction, and also limit the phase space for emissions of additional jets. We find a signicant...
Dr
Stephane Munier
(CPHT, Ecole polytechnique, CNRS)
26/08/2014, 14:30
1) Quarks and gluons in hot and dense matter
Talk
Starting with the interpretation of parton evolution with rapidity as a branching-diffusion process, we describe the different kinds of fluctuations of the density of partons which affect the properties of QCD scattering amplitudes at moderately high energies. We then derive some of these properties as direct consequences of the stochastic picture. We get new results on the expression of the...
Dr
Matthew Lamont
(Brookhaven National Lab)
26/08/2014, 15:30
1) Quarks and gluons in hot and dense matter
Talk
Despite the successes of the HERA collider, where much information was gained on the structure of the nucleon, data on the structure of the nucleus at moderate-to-small \x remains elusive, as only fixed-target high-\x data currently exist. The small-\x region, however, is of great interest. The nucleon structure in this region is dominated by gluons which show a rapid rise with decreasing...
Mr
Martin Spousta
(Charles University)
28/08/2014, 14:00
1) Quarks and gluons in hot and dense matter
Talk
Measurements of soft and hard particle production in proton-lead collisions at the LHC have provided surprising results. Studies of correlations in the production of soft particles have provided results that suggest strong collective behavior similar to that observed in lead-lead collisions. Measurements of jets and high-pT hadrons have shown an unexpected enhancement in the production of...
Ms
Mueller Katharina
(Universität Zürich)
28/08/2014, 14:30
1) Quarks and gluons in hot and dense matter
Talk
The production of J/ψ and Υ-mesons decaying into dimuon final state is studied at the LHCb experiment, with rapidity 1.5 < y < 4.0 or -5.0 < y < -2.5 and transverse momentum pT < 15 GeV/c, in proton-lead collisions at a proton-nucleon centre-of-mass energy of 5 TeV. The analysis is based on a data sample corresponding to an integrated luminosity of 1.6/nb. The forward-backward production ratio...
E. Kryshen
(CERN)
28/08/2014, 15:00
1) Quarks and gluons in hot and dense matter
Talk
Pb nuclei, accelerated at LHC, are sources of strong electromagnetic fields that can be used to
measure photon-induced interactions in a new kinematic regime. These interactions can be studied
in ultra-peripheral p-Pb and Pb-Pb collisions where impact parameters are larger than the sum of
nuclear radii and hadronic interactions are strongly suppressed. Heavy quarkonium photoproduction
is...
Dr
Boris Tomasik
(Univerzita Mateja Bela)
28/08/2014, 15:30
1) Quarks and gluons in hot and dense matter
Talk
Anisotropies of the azimuthal hadron distributions measured in nuclear collisions at highest energies carry information about the anisotropies of collective transverse expansion. Through a comparison of these data with hydrodynamic simulations one hopes to extract transport coefficients of the hot nuclear matter. It is widely accepted that the flow anisotropies have their root in strong...
Mr
Krzysztof Wozniak
(Cracow)
28/08/2014, 16:30
1) Quarks and gluons in hot and dense matter
Talk
Measurements of low-pT (< 5 GeV) particle production have provided
valuable insight on the production and evolution of the quark-gluon
plasma in Pb+Pb collisions at the LHC. In particular, measurements of
elliptic and higher order collective flow imprinted on the azimuthal angle
distributions of low-pT particles directly probe the strongly-coupled
dynamics of the quark gluon plasma and...
Jacek Otwinowski
(The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Science)
28/08/2014, 17:00
1) Quarks and gluons in hot and dense matter
Talk
The transverse momentum distributions (pT) of charged particles and identied
hadrons in p-Pb collisions at sqrt(sNN) = 5.02 TeV have been measured by ALICE at
the LHC. Charged-particle tracks are reconstructed at mid-rapidity over a large momentum
range 0.15 < pT < 50 GeV/c. Light-flavoured hadrons and resonances are identied
in the various momentum ranges from 0.15 GeV/c up to 15 GeV/c by...
Ramona Lea
(University and INFN Trieste)
28/08/2014, 17:20
1) Quarks and gluons in hot and dense matter
Talk
Thanks to its excellent particle identification and momentum
measurement capabilities, the ALICE detector allows for the identification
of deuterons, tritons, $\rm ^{3}{He}$ and $\rm ^{4}{He}$ and and their
corresponding antinuclei. This is achieved via their specific energy
loss in the Time Projection Chamber and the velocity measurement by the
Time-Of-Flight detector. Moreover,...
Mr
Kefeng Xin
(Rice University)
28/08/2014, 17:40
1) Quarks and gluons in hot and dense matter
Talk
In ultrarelativistic heavy-ion collisions with high particle multiplicities, a produced muon can be bound to a charged hadron (proton, antiproton, $K^{+}$, $K^{-}$, $\pi^{+}$, $\pi^{-}$) by Coulomb force and form a hydrogen-like atom. Among these atoms, the antimatter muonic hydrogen and the $K-\mu$ atom have been predicted but not yet been discovered. At the STAR experiment, muon...
Dr
Baldo Sahlmueller
(Muenster)
28/08/2014, 18:00
1) Quarks and gluons in hot and dense matter
Talk
Over the last decade it has been established that a quark-gluon plasma (QGP) is formed in ultrarelativistic A+A collisions at RHIC energies. In recent years, detector upgrades have enabled the detailed study of this hot and dense matter. Although the RHIC d+Au program was originally undertaken to study initial state and cold nuclear matter effects, recent measurements at both RHIC (d+Au) and...