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Charge fluctuations and electric mass in a hot meson gas

AuthorsDöring, Michael ; Koch, V.
KeywordsBy-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 Date14-Nov-2007
PublisherAmerican Physical Society
CitationPhysical Review C 76(5): 054906 (2007)
AbstractNet 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.
Description25 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
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