Name: Thermal pions
Creator: Ulf-G. Meißner
Keywords: Nuclear Theory (nucl-th), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Nuclear Theory, 0103 physical sciences, FOS: Physical sciences, 7. Clean energy, 01 natural sciences

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 01 Jan 1994Embargo end date: 01 Jan 1993 English Publisher:Elsevier BVJournal:Nuclear Physics A, volume 566, pages 141-147 (issn: 0375-9474,

Authors: Ulf-G. Meißner;

doi: 10.1016/0375-9474(94)90618-1 , 10.48550/arxiv.hep-ph/9306275

arXiv: http://arxiv.org/abs/hep-ph/9306275

Thermal pions

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Abstract

I discuss the absorption and dispersion of pions in hot matter. A two-loop calculation in the framework of chiral perturbation theory is presented and its result is compactly written in terms of the two- and three-particle forward $��$ scattering amplitudes. At modest temperatures, $T \le 100$ MeV, the change in the pion mass is small and its dispersion law closely resembles the free space one. At these temperatures, all quantities of interest are given to a good degree of accuracy by the first term in the virial expansion which is linear in the density. (BUTP-93/16, uses espcrc1.sty from North-Holland Publishing)

7 pp, LaTeX, uses espcrc1.sty from North-Holland Publishing, BUTP-93/16

Related Organizations

University of Bern
Switzerland
ETH Zurich
Switzerland
Institute for Theoretical Physics
Switzerland

Keywords

Nuclear Theory (nucl-th), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Nuclear Theory, FOS: Physical sciences

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