Tsallis-Pareto like distributions in hadron-hadron collisions

G. Barnaföldi, K. Ürmössy, T. Bíró

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Non-extensive thermodynamics is a novel approach in high energy physics. In high-energy heavy-ion, and especially in proton-proton collisions we are far from a canonical thermal state, described by the Boltzmann-Gibbs statistic. In these reactions low and intermediate transverse momentum spectra are extremely well reproduced by the Tsallis-Pareto distribution, but the physical origin of Tsallis parameters is still an unsettled question. Here, we analyze whether Tsallis-Pareto energy distribution do overlap with hadron spectra at high-pT. We fitted data, measured in proton-proton (proton-antiproton) collisions in wide center of mass energy range from 200 GeV RHIC up to 7 TeV LHC energies. Furthermore, our test is extended to an investigation of a possible √s-dependence of the power in the Tsallis-Pareto distribution, motivated by QCD evolution equations. We found that Tsallis-Pareto distributions fit well high-pT data, in the wide center of mass energy range. Deviance from the fits appears at pT > 20-30 GeV/c, especially on CDF data [7]. Introducing a pT-scaling ansatz, the fits at low and intermediate transverse momenta still remain good, and the deviations tend to disappear at the highest-pT data.

Original languageEnglish
Article number012008
JournalJournal of Physics: Conference Series
Volume270
Issue number1
DOIs
Publication statusPublished - 2011

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collisions
antiprotons
transverse momentum
center of mass
energy
protons
heavy ions
energy distribution
quantum chromodynamics
statistics
deviation
scaling
thermodynamics
physics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Tsallis-Pareto like distributions in hadron-hadron collisions. / Barnaföldi, G.; Ürmössy, K.; Bíró, T.

In: Journal of Physics: Conference Series, Vol. 270, No. 1, 012008, 2011.

Research output: Contribution to journalArticle

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