Pion damping width from SU(2) x SU(2) NJL model

Details Pion damping width from SU(2) x SU(2) NJL model Pion damping width from SU(2) x SU(2) NJL model

2003-03-14

arxiv.org/abs/nucl-th/0303034v1

Phys.Atom.Nucl. 66 (2003) 2233-2237; Yad.Fiz. 66 (2003) 2285-2289

Physics

Nuclear Physics

Nuclear Theory

LaTeX2e, 13 pages, 2 figures

Scientific paper

10.1134/1.1634332

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.

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