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Based on the kinetic theory with relaxation time approximation, we investigate the bulk viscosity ($\zeta$) and its ratio to shear viscosity ($\zeta/\eta$) of quark matter at finite temperature and chemical potential with the in-medium…

High Energy Physics - Phenomenology · Physics 2026-01-16 Chong-long Xie , Guo-yun Shao , Ming-zheng-xuan Wu , Wei-bo He

We study the transport coefficients of Quark-Gluon-Plasma in finite temperature and finite baryon density. We use AdS/QCD of charged AdS black hole background with bulk-filling branes identifying the U(1) charge as the baryon number. We…

High Energy Physics - Theory · Physics 2008-12-25 Xian-Hui Ge , Yoshinori Matsuo , Fu-Wen Shu , Sang-Jin Sin , Takuya Tsukioka

We develop a framework to calculate transport properties in cold, dense relativistic quasiparticle system within the Fermi-liquid theory at the mean-field level. Building on our previous study [Phys. Rev. C 111, 044904 (2025)], we start…

Nuclear Theory · Physics 2025-12-02 Jianing Li , Weiyao Ke , Jin Hu

The bulk viscosity, $\zeta$ and its ratio with the shear viscosity, $\zeta/\eta$ have been studied in an anisotropically expanding pure glue plasma in the presence of turbulent color fields. It has been shown that the anisotropy in the…

Nuclear Theory · Physics 2011-11-23 Vinod Chandra

We compute the transport coefficients, namely, the coefficients of shear and bulk viscosities as well as thermal conductivity for hot and dense matter. The calculations are performed within the Polyakov loop extended quark meson model. The…

High Energy Physics - Phenomenology · Physics 2018-01-21 Aman Abhishek , Sabyasachi Ghosh , Hiranmaya Mishra

Bulk thermal conductivity estimates based on predictions from non-equilibrium molecular dynamics (NEMD) using the so-called direct method are known to be severely under-predicted since finite simulation length-scales are unable to mimic…

Computational Physics · Physics 2018-07-13 Manav Vohra , Ali Yousefzadi Nobakht , Seungha Shin , Sankaran Mahadevan

We initiate the study of equilibration rates of strongly coupled quark-gluon plasmas in the absence of conformal symmetry. We primarily consider a supersymmetric mass deformation within ${\cal N}=2^{*}$ gauge theory and use holography to…

High Energy Physics - Theory · Physics 2015-06-24 Alex Buchel , Michal P. Heller , Robert C. Myers

We use leading-order anisotropic hydrodynamics to study an azimuthally-symmetric boost-invariant quark-gluon plasma. We impose a realistic lattice-based equation of state and perform self-consistent anisotropic freeze-out to hadronic…

We have studied how the thermoelectric properties of the quark-gluon plasma (QGP) are affected by a weak-momentum anisotropy arising from the asymptotic expansion of matter in the initial stages of ultrarelativistic heavy-ion collisions.…

High Energy Physics - Phenomenology · Physics 2026-04-07 Shubhalaxmi Rath , Nicolás A. Neill

The quark-gluon plasma (QGP) is a high temperature state of matter produced in the collisions of two nuclei at relativistic energies. The properties of this matter at short distance scales are probed using jets with high transverse momentum…

High Energy Physics - Phenomenology · Physics 2024-02-07 Abraham Holtermann , Jacquelyn Noronha-Hostler , Anne M. Sickles , Xiaoning Wang

In relativistic heavy-ion collisions, the production of heavy quarks at large transverse momenta is strongly suppressed compared to proton-proton collisions. In addition an unexpectedly large azimuthal anisotropy was observed for the…

Nuclear Theory · Physics 2018-12-12 Weiyao Ke , Yingru Xu , Steffen A. Bass

We calculate the shear viscosity $\eta$ in the quark-gluon plasma (QGP) phase within a virial expansion approach with particular interest in the ratio of $\eta$ to the entropy density $s$, i.e. $\eta/s$. The virial expansion approach allows…

High Energy Physics - Phenomenology · Physics 2011-02-09 S. Mattiello , W. Cassing

We investigate particle spectra and elliptic flow coefficients in relativistic heavy ion collisions by taking into account the distortion of phase space distributions due to bulk viscosity at freezeout. We first calculate the distortion of…

Nuclear Theory · Physics 2010-03-19 Akihiko Monnai , Tetsufumi Hirano

Driven by the Beam Energy Scan (BES) program at the RHIC, researches and discussions on the QCD phase diagram have flourished recently. In order to provide a reference from microscopic transport models, we performed a systematic analysis,…

High Energy Physics - Phenomenology · Physics 2014-09-04 N. Yu , F. Liu , K. Wu

We discuss the properties of the collective modes of a system composed by a thermalized quark-gluon plasma traversed by a relativistic jet of partons. The transport equations obeyed by the components of the plasma and of the jet are studied…

High Energy Physics - Phenomenology · Physics 2008-11-26 Massimo Mannarelli , Cristina Manuel

We develop a set of coupled Boltzmann equations to describe the dynamical evolution of heavy quarks and quarkonia inside the quark-gluon plasma. The quarkonium dissociation and recombination terms are calculated from pNRQCD. Their interplay…

Nuclear Theory · Physics 2019-01-23 Xiaojun Yao , Weiyao Ke , Yingru Xu , Steffen Bass , Berndt Müller

A new model of jet quenching in nuclear collisions, CUJET3.0, is constructed by generalizing the perturbative QCD based CUJET2.0 model to include two complementary non-perturbative features of the QCD confinement cross-over phase transition…

High Energy Physics - Phenomenology · Physics 2016-03-15 Jiechen Xu , Jinfeng Liao , Miklos Gyulassy

At nonzero temperature in QCD, about the deconfining phase transition there is a "semi" quark gluon plasma (semi-QGP), where the expectation value of the (renormalized) Polyakov loop is less than one. This can be modeled by a semiclassical…

High Energy Physics - Phenomenology · Physics 2010-04-28 Yoshimasa Hidaka , Robert D. Pisarski

The shear and bulk viscosities of gluon plasma are calculated by accumulating a large amount of data for the Matsubara Green function ($G_{\beta}(t_m)$) on isotropic $24^3 \times 8$ and $16^3 \times 8$ lattices. In the case of Iwasaki's…

High Energy Physics - Lattice · Physics 2009-11-13 Sunao Sakai Atsushi Nakamura

Transport coefficients are of crucial importance in theoretical as well as experimental studies. Despite substantial research on classical hard sphere/disk gases in low and high density regimes, a thorough investigation of transport…

Statistical Mechanics · Physics 2020-08-04 Malihe Ghodrat
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