Speaker
Description
We have studied different viscous coefficients of thermal QCD medium at finite magnetic field and chemical potential in the kinetic theory approach. The interactions among partons have been incorporated through their thermal masses. It is found that the magnetic field reduces both shear ($\eta$) and bulk ($\zeta$) viscosities, whereas the chemical potential enhances these viscosities. Thus, completely different effects of magnetic field and chemical potential on shear and bulk viscosities have been noticed. This study further facilitates to comprehend the sound attenuation through the Prandtl number (Pr), the nature of the flow through the Reynolds number (Re), the fluid characteristics and the information on the phase transition of matter through the specific shear ($\eta/s$) and specific bulk ($\zeta/s$) viscosities, respectively. The observation on the Prandtl number reveals that the momentum diffusion prevails over the thermal diffusion in the sound attenuation and the presence of magnetic field makes this dominance strong, contrary to the chemical potential which makes it weak. An increase of the Reynolds number due to the magnetic field and its decrease due to the chemical potential have also been observed, and the nature of the constituent flow remains laminar. Furthermore, $\eta/s$ gets decreased at finite magnetic field, opposite to its increase at finite chemical potential, whereas a decrease of $\zeta/s$ is observed in the presence of both magnetic field and chemical potential.
| Session | Heavy Ions and QCD |
|---|
