Pion scalar density and chiral symmetry restoration at finite temperature and density

G. Chanfray; D. Davesne; J. Delorme; M. Ericson; J. Marteau

doi:10.1007/s100500070111

EPJ

Pion scalar density and chiral symmetry restoration at finite temperature and density

G. Chanfray¹^*, D. Davesne¹, J. Delorme¹, M. Ericson¹^,2 and J. Marteau¹

¹ Institute de Physique Nucléaire de Lyon, IN2P3-CNRS et Université Cl. Bernard, 43, Bvd. du 11 novembre 1918, F-69622, Villeurbanne Cedex, France
² Theory Division, CERN, CH-1211, Geneva 23, Switzerland

Received: 7 December 1999
Revised: 31 March 2000
Published online: 15 June 2000

Abstract

This paper is devoted to the evaluation of the pionic scalar density at finite temperature and baryonic density. We express the latter effect in terms of the nuclear response evaluated in the random phase approximation. We discuss the density and temperature evolution of the pionic density which governs the quark condensate evolution. Numerical evaluations are performed.

PACS: 14.40.Aq π, K and η mesons – / 24.85.+p Quarks, gluons, and QCD in nuclei and nuclear processes –