Multiplicity fluctuations due to the temperature fluctuations in high-energy nuclear collisions

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dc.creatorWilk, Grzegorz
dc.creatorWlodarczyk, Zbigniew
dc.date2009-02-23
dc.date2009-03-31
dc.date.accessioned2026-07-07T13:12:04Z
dc.date.available2026-07-07T13:12:04Z
dc.descriptionWe investigate the multiplicity fluctuations observed in high-energy nuclear collisions attributing them to intrinsic fluctuations of temperature of the hadronizing system formed in such processes. To account for these fluctuations we replace the usual Boltzmann-Gibbs (BG) statistics by the non-extensive Tsallis statistics characterized by the nonextensivity parameter q, with |q-1| being a direct measure of fluctuations. In the limit of vanishing fluctuations, q --> 1 and Tsallis statistics converges to the usual BG. We evaluate the nonextensivity parameter q and its dependence on the hadronizing system size from the experimentally observed collision centrality dependence of the mean multiplicity, <N>, and its variance, Var(N). We attribute the observed system size dependence of q to the finiteness of the hadronizing source with q = 1 corresponding to an infinite, thermalized source with a fixed temperature, and with q > 1 (which is observed) corresponding to a finite source in which both the temperature and energy fluctuate.
dc.description11 pages, 5 figures; revised version, new references and footnote added
dc.identifierhttps://arxiv.org/abs/0902.3922
dc.identifierhttp://arxiv.org/abs/0902.3922
dc.identifierPhys. Rev. C79 (2009) 054903
dc.identifierdoi:10.1103/PhysRevC.79.054903
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/229481
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleMultiplicity fluctuations due to the temperature fluctuations in high-energy nuclear collisions
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