DILEPTON AND PHOTON-EMISSION RATES FROM A HADRONIC GAS - III

Citation
Ch. Lee et al., DILEPTON AND PHOTON-EMISSION RATES FROM A HADRONIC GAS - III, Physical review. C. Nuclear physics, 58(5), 1998, pp. 2899-2906
Citations number
32
Categorie Soggetti
Physics, Nuclear
ISSN journal
05562813
Volume
58
Issue
5
Year of publication
1998
Pages
2899 - 2906
Database
ISI
SICI code
0556-2813(1998)58:5<2899:DAPRFA>2.0.ZU;2-#
Abstract
We extend our early analyses of the dilepton and photon emission rates from a hadronic gas to account for strange mesons using a density exp ansion. The emission rates are reduced to vacuum correlation functions using three-flavor chiral reduction formulas, and the latter are asse ssed in terms of empirical data. Using a fireball, we compare our resu lts to the low and intermediate mass dilepton data available from CERN . Our results suggest that a baryon free hadronic gas does not account for the excess of low mass dielectrons observed at CERES but does wel l in accounting for the intermediate dimuons at HELIOS. The same obser vations apply to the recent low and high p(t) dielectron rates from CE RES. [S0556-2813(98)04411-2].