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5–12 Jul 2017
Venice, Italy
Europe/Zurich timezone
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Energy and rapidity dependence of pion production at relativistic energies using Tsallis statistics

Not scheduled
15m
Salone Adriatico (Palazzo del Casinò)

Salone Adriatico

Palazzo del Casinò

Board: HI-7
Poster Presentation Heavy Ion Physics Poster session

Speaker

Oana Ristea (University of Bucharest, Faculty of Physics)

Description

Transverse momentum distributions of pions produced in relativistic nuclear collisions (p-p, Cu-Cu, Pb-Pb, Au-Au) at various energies including BES data are studied using Tsallis distribution as a parametrization. We will present the energy dependence and collision centrality of the Tsallis fit parameters, Tsallis temperature, volume and non-extensivity parameter, a parameter characterizing the degree of non-equilibrium for the systems produced in these collisions. Rapidity dependence of the Tsallis parameters is investigated using BRAHMS data and it is found that deviations from Boltzmann statistics are decreasing with rapidity, temperature values are increasing with rapidity, but the T/cosh(y) ratio is constant as a function of rapidity. The physics implications of these results on the collision dynamics will be discussed.

Primary authors

Oana Ristea (University of Bucharest, Faculty of Physics) Dr Alexandru Jipa (University of Bucharest, Faculty of Physics) Dr Catalin Ristea (Institute of Space Science, Bucharest-Magurele, University of Bucharest) Dr Ionel Lazanu (University of Bucharest, Faculty of Physics) Dr Marius Calin (University of Bucharest, Faculty of Physics) Dr Tiberiu Esanu (National Institute of Nuclear Physics and Engineering Horia Hulubei, Magurele)

Presentation materials