Impact of nonextensivity on the transport coefficients of strongly interacting QCD matter  

作　　者：Dhananjay Singh Arvind Kumar 

机构地区：[1]Department of Physics,Dr.B R Ambedkar National Institute of Technology Jalandhar,Jalandhar–144008,Punjab,India

出　　处：《Chinese Physics C》2025年第2期89-105,共17页中国物理C(英文版)

基　　金：Supported by the Ministry of Science and Human Resources(MHRD),Government of India,via an Institute fellowship under the Dr B R Ambedkar National Institute of Technology Jalandhar。

摘　　要：Tsallis nonextensive statistics is applied to study the transport coefficients of strongly interacting matter within the Polyakov chiral quark mean field model(PCQMF).Nonextensivity is introduced within the PCQMF model through a dimensionless parameter q to examine the viscous properties,such as shear viscosity(η)and bulk viscosity(σ_(el)),and conductive properties,such as electrical conductivity(c_(vq))and thermal conductivity(κ).Additionally,some key thermodynamic quantities relevant to the transport coefficients,such as the speed of sound(c_(sq)^(2))and specific heat at constant volume(c_(vq)),are calculated.The temperature dependence of the transport coefficients is explored through a kinetic theory approach with the relaxation time approximation.The results are compared to those of the extensive case where q approaches 1.The nonextensive q parameter is found to have a significant effect on all transport coefficients.We find that the nonextensive behaviour of the medium enhances specific shear viscosity,as well as conductive coefficientsσ_(el)/T and k/T(2).In contrast,the normalized bulk viscosity is found to decrease as the nonextensivity of the medium increases.We also studied the transport coefficients for finite values of chemical potentials.The magnitudes ofη,σ_(EL),andκincrease at lower temperatures,whileζ_(b)is found to decrease for systems with non-zero chemical potential.

关 键 词：quark matter transport properties nonextensive statistics 

分 类 号：O57[理学—粒子物理与原子核物理]