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Open Access item Charge fluctuations and electric mass in a hot meson gas

Authors:Döring, Michael
Koch, V.
Keywords:By-event fluctuations, Chiral unitary approach, Vector mesons, Statistical mechanics, [PACS] Quark–gluon plasma, [PACS] Quark deconfinement, quark-gluon plasma production, and phase transitions in heavy-ion collisions, [PACS] Finite-temperature field theory, [PACS] Statistical theory and fluctuations in nuclei
Issue Date:14-Nov-2007
Publisher:American Physical Society
Citation:Physical Review C 76(5): 054906 (2007)
Abstract:Net charge fluctuations in a hadron gas are studied using an effective hadronic interaction. The emphasis of this work is to investigate the corrections of hadronic interactions to the charge fluctuations of a noninteracting resonance gas. Several methods such as loop, density, and virial expansions are employed. The calculations are also extended to SU(3), and some resummation schemes are considered. Although the various corrections are sizable individually, they cancel to a large extent. As a consequence, we find that charge fluctuations are rather well described by the free resonance gas.
Description:25 pages, 18 figures.-- PACS nrs.: 12.38.Mh; 25.75.Nq; 11.10.Wx; 24.60.-k.-- ISI Article Identifier: 000251327000054.-- ArXiv pre-print available at: http://arxiv.org/abs/nucl-th/0609073
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevC.76.054906
URI:http://hdl.handle.net/10261/9149
ISSN:0556-2813
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