arXiv:nucl-th/0303034·v1·Nuclear Theory
Pion damping width from SU(2) x SU(2) NJL model
D. Blaschke (1,2)🇷🇺 · M. K. Volkov (2)🇷🇺 · V. L. Yudichev (2) ((1) Rostock Univ., Germany; (2) JINR, Dubna, Russia)🇷🇺
Abstract
Within the framework of the NJL model, we investigate the modification of the pion damping width in a hot pion gas for temperatures ranging from 0 to 180 MeV. The pion is found to broaden noticeably at T > 60 MeV. Near the chiral phase transition T ~ 180 MeV, the pion width is saturated and amounts to 70 MeV. The main contribution to the width comes from pion-pion collisions. Other contributions are found negligibly small.
Comments: LaTeX2e, 13 pages, 2 figures