4th International Conference on the Initial Stages in High-Energy Nuclear Collisions

Session

POSTER SESSION

Sep 21, 2017, 4:30 PM

Karolina Lanckorońska Hall (catering during the poster session in the PAU’s courtyard)

19. Coupled kinetic equations for quarks and gluons in the relaxation time approximation

Ewa Maksymiuk (Jan Kochanowski University)

Coupled kinetic equations for quarks and gluons are solved numerically in the relaxation time approximation for the case of one-dimensional, boost-invariant geometry. Quarks are massive and described by the Fermi-Dirac statistics, while gluons are massless and obey Bose-Einstein statistics. The solutions of such a system are compared with predictions of various formulations of relativistic,...

61. D meson production and long-range azimuthal correlation in 8.16 TeV p+Pb collisions with ATLAS

Qipeng Hu (University of Colorado Boulder), ATLAS Collaboration

Measurements of production of prompt charm mesons (D0 and D) and
azimuthal correlations between inclusive D and charged particles are
presented in p+Pb collisions data at 8.16 TeV collected in 2016 by
ATLAS. The prompt charm meson production is measured in minimum bias
p+Pb data, reconstructed via two decay channels: D0->K+pi and
D*->D0+pi->K+pi+pi. The production asymmetry between forward...

15. Early-stage entropy production in the semiclassical approximation

hidekazu tsukiji

Understanding early thermalization is a theoretical challenge in relativistic heavy ion collisions and semi-classical treatment is valid in the relevant stage. In this work, we investigate thermalization process by using Husimi-Wehrl (HW) entropy defined by Husimi function which is a coarse-grained quantum distribution function. We propose numerical methods to calculate the semi-classical time...

5. Examination of heavy-ion collisions using EPOS model

Maria Stefaniak (Warsaw University of Technology)

Collisions of heavy-ions are major method used to study properties of matter. Such studies are
performed with comparison of experimental data and model simulations.

One of theoretical description is Parton-Based Gribov-Regge theory included in the
phenomenological model EPOS. It was originally created to explain the processes at the highest
energies obtained with LHC complex. EPOS gives...

66. Measurement of the fragmentation function for photon-tagged jets in 5.02 TeV Pb+Pb and pp collisions with the ATLAS detector

ATLAS Collaboration, Dennis Perepelitsa (University of Colorado Boulder)

A measurement of the charged-particle fragmentation function (FF) for
jets azimuthally balanced by a high transverse momentum (pT) prompt,
isolated photon is presented. FFs as a function of particle-pT and
fraction of the jet pT carried by the particle, z, are measured in
26/pb of pp and 0.49/nb of Pb+Pb collision data at 5.02 TeV recorded
with the ATLAS detector. In pp collisions, a...

60. Measurement of W boson production in Pb+Pb and pp collisions at 5.02 TeV with the ATLAS detector

Jakub Andrzej Kremer (AGH University of Science and Technology (PL)), ATLAS Collaboration

Lead-lead collisions at the LHC are capable of producing a system of deconfined quarks and gluons at unprecedented energy density and temperature. The production yields of W bosons decaying to leptons, which do not interact with the strongly-coupled medium, may be used to look for deviations from binary collision scaling, e.g. related to impact-parameter nPDF effects. Moreover, the W boson ...

122. Open Charm measurements with a new silicon Vertex Detector at the NA61/SHINE experiment at CERN SPS

Dag Larsen (Jagiellonian University (PL))

The heavy-ion programme of the NA61/SHINE experiment at CERN SPS has been extended hrough the use of new silicon Vertex Detector which provides precise measurements of exotic particles with short lifetime. The study of open charm mesons allows for investigation of the properties of the hot and dense matter produced in nuclear-nuclear collisions. The detector was designed to meet the challenges...

21. Plasmon mass scale in out of equilibrium classical Yang-Mills theory

Jarkko Peuron (University of Jyväskylä)

The prethermal evolution of heavy-ion collisions is usually studied by classical real-time lattice simulations. Above the Debye scale the classical
theory can be matched smoothly to kinetic theory. We study the limits of the quasiparticle picture of the CYM fields by determining the plasmon mass of the system with different methods, including the effective dispersion relation, hard thermal...

141. Probes of thermalization and quarkonium dissociation in an equilibrating strongly interacting plasma

Loredana Bellantuono

The evolution of a deconfined and strongly coupled plasma, from an initial anisotropic and far-from-equilibrium state to a hydrodynamic regime, is examined in a holographic framework. A distortion of the boundary metric (quench) is employed to drive the system in the initial configuration, which mimics the effects of heavy ion collisions producing QGP in experiments at RHIC and LHC. The...

20. The Langevin Formulation of JIMWLK Evolution

Ms Andrecia Ramnath (University of Jyvaskyla)

Within the Colour Glass Condensate effective field theory, the JIMWLK equation can also be used to describe the energy evolution of long-range rapidity correlations in nuclear collisions. The projectile interaction with the target classical field is described by Wilson lines. It is useful for numerical implementations to study JIMWLK evolution as a stochastic process. A Langevin equation then...

142. Thermodynamics of Mott dissociation of hadronic matter within a generalized Beth - Uhlenbeck approach

Aleksandr Dubinin

We present an effective model for low-energy QCD thermodynamics which provides a microscopic interpretation of the transition from a gas of hadron resonances to the quarkgluon plasma by Mott dissociation of hadrons and compare results with data from lattice QCD simulations. We consider the thermodynamics of the Polyakov-loop extended ...