Nonequilibrium meson production in strong fields. (January 2016)

• Record Type: Journal Article
• Authors: Juchnowski, L; Blaschke, D; Fischer, T; Smolyansky, S A
• Is Part Of: Journal of physics. Volume 673(2016)
• Publication Date: 2016-01
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/673/1/012009
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: We develop a kinetic equation approach to nonequilibrium pion and sigma meson production in a time-dependent, chiral symmetry breaking field (inertial mechanism). We investigate the question to what extent the low-momentum pion enhancement observed in heavy- ion collisions at CERN - LHC can be addressed within this formalism. In a first step, we consider the inertial mechanism for nonequilibrium production of a—mesons and their simultaneous decay into pion pairs for two cases of a mass evolution. The resulting pion distribution shows a strong low-momentum enhancement which can be approximated by a thermal Bose distribution with a chemical potential that appears as a trace of the nonequilibrium process of its production.