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Titolo:
Properties of rho and omega mesons at finite temperature and density as inferred from experiment - art. no. 035202
Autore:
Eletsky, VL; Belkacem, M; Ellis, PJ; Kapusta, J;
Indirizzi:
Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA Univ Minnesota Minneapolis MN USA 55455 Astron, Minneapolis, MN 55455 USA Inst Theoret & Expt Phys, Moscow 117218, Russia Inst Theoret & Expt Phys Moscow Russia 117218 hys, Moscow 117218, Russia Univ Toulouse 3, Phys Quant Lab, F-31062 Toulouse, France Univ Toulouse 3Toulouse France F-31062 nt Lab, F-31062 Toulouse, France
Titolo Testata:
PHYSICAL REVIEW C
fascicolo: 3, volume: 6403, anno: 2001,
pagine: 5202 -
SICI:
0556-2813(200109)6403:3<5202:PORAOM>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEAVY-ION COLLISIONS; QCD SUM-RULES; HADRONIC MATTER; NUCLEAR-MATTER; VECTOR-MESONS; HOT; PHYSICS; MODEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Eletsky, VL Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA Univ Minnesota Minneapolis MN USA 55455 eapolis, MN 55455 USA
Citazione:
V.L. Eletsky et al., "Properties of rho and omega mesons at finite temperature and density as inferred from experiment - art. no. 035202", PHYS REV C, 6403(3), 2001, pp. 5202

Abstract

The mass shift, width broadening, and spectral density for rho and omega mesons in a heat bath of nucleons and pions are calculated using a general formula which relates the self-energy to the real and imaginary parts of theforward scattering amplitude. We use experimental data to saturate the scattering amplitude at low energies with resonances and include a background Pomeron term, while at high energies a Regge parametrization is used. The real part obtained directly is compared with the result of a dispersion integral over the imaginary part. The peaks of the spectral densities are little shifted from their vacuum positions, but the widths are considerably increased due to collisional broadening. Where possible we compare with the UrQMD model and find quite good agreement. At normal nuclear matter density and a temperature of 150 MeV the spectral density of the rho meson has a width of 345 MeV, while that for the omega is in the range 90-150 MeV.

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Documento generato il 28/11/20 alle ore 04:23:41