$\Delta$ self-energy at finite temperature and density and the $\pi N$ cross-section
High Energy Physics - Phenomenology
2017-03-13 v2 Nuclear Theory
Abstract
The self energy of -baryon is evaluated at finite temperature and density using the real time formalism of thermal field theory. The Dyson-Schwinger equation is used to get the exact thermal propagator followed by the spectral function of . The scattering cross section obtained using explicit exchange is normalized to the experimental data in vacuum and its medium modification is implemented by means of the exact thermal propagator. A significant suppression of the peak of the cross-section is observed at higher temperature and baryon density. Effects on the mean relaxation time of nucleons and the temperature dependence of the shear viscosity of a pion nucleon gas are demonstrated.
Keywords
Cite
@article{arxiv.1603.06699,
title = {$\Delta$ self-energy at finite temperature and density and the $\pi N$ cross-section},
author = {Snigdha Ghosh and Sourav Sarkar and Sukanya Mitra},
journal= {arXiv preprint arXiv:1603.06699},
year = {2017}
}