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arXiv · 2401.08384

Shear and bulk viscosity of quark-gluon plasma with Gribov gluons and quasiparticle quarks

Sadaf Madni·Arghya Mukherjee·Amaresh Jaiswal·Najmul Haque
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Abstract

In this study, we analyze the transport properties of the Quark-Gluon Plasma, focusing on bulk ($\zeta$) and shear ($\eta$) viscosities at vanishing chemical potential. To describe the QGP, we employ a quasiparticle model for quarks along with Gribov's prescription for gluons, which effectively captures non-perturbative dynamics. The Gribov parameter $\gamma_G$ and the dynamical mass $m_g$ are obtained by solving the one-loop gap equation in the $\overline{\text{MS}}$ renormalization scheme and further using lattice QCD data for the equation of state (EoS) of pure gluonic matter. The interaction between quarks and gluons is reflected in the quark quasi-mass $m_q$, again obtained using lattice EoS data for (2+1)-flavor QCD. Our primary goal is to invertigate the influence of quasi-quarks on the transport coefficients of QGP. Interestingly, we find a substantial decrease in the scaled transport coefficients with rising temperatures within the range ($1 \le T/T_c \le 3.5$).

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Sadaf Madni, Arghya Mukherjee, Amaresh Jaiswal, Najmul Haque. 2024-01-16. Shear and bulk viscosity of quark-gluon plasma with Gribov gluons and quasiparticle quarks. https://doi.org/10.1103/physrevd.110.116035

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