Role of Magnetic Interaction in Dense Plasma

S Sarkar,A K Dutt-Mazumder,K Pal

doi:10.1155/2013/530895

S Sarkar, A K Dutt-Mazumder + Show 1 more

Open Access

https://doi.org/10.1155/2013/530895

Copy DOI

Abstract

Quasiparticle excitations and associated phenomena of energy and momentum transfer rates have been calculated in terms of the drag and the diffusion coefficients exposing clearly the dominance of the magnetic interaction over its electric counterpart. The results have been compared with the finite temperature results highlighting the similarities and dissimilarities in the two extreme regimes of temperature and density. Non-Fermi-liquid behavior of various physical quantities like neutrino mean free path and thermal relaxation time due to the inclusion of magnetic interaction has clearly been revealed. All the results presented in the current review are pertinent to the degenerate and ultradegenerate plasma.

Highlights

Understanding the properties of the hot and dense ultrarelativistic plasma has been at the forefront of contemporary research for the past few decades
It is to be noted that the theoretical calculations so far involving both the quantum electrodynamics and quantum chromodynamics (QED/QCD) have been confined largely to the domain of high temperature to address the issues related to heavy ion collisions
The neutrino mean free path is related to the total interaction rate due to neutrino emission averaged over the initial quark spins and summed over the final state phase space and spins

Summary

Introduction

Understanding the properties of the hot and dense ultrarelativistic plasma has been at the forefront of contemporary research for the past few decades. We compare the results of quasiparticle lifetime in the extreme limits of high temperature and high density For the former it is known that the damping rate for the exchange of static gauge boson remains unscreened even when one uses hard thermal loop corrected propagator for the gauge bosons [11, 12]. At very high density nowadays it is well known that quark matter is expected to form a color superconducting color-flavour locked (CFL) phase [15] In this phase all quark excitations are gapped, and the mean free path or the thermal relaxation time is modified by exponential factor involving gap parameter [16,17,18]. The extension of the present calculation for the gapped quark matter is straightforward

Damping Rate

Drag and Diffusion Coefficients

Neutrino Mean Free Path

Cooling of Neutron Star

Thermal Relaxation Time

Conclusion