Centrality dependence of freeze-out temperature fluctuations in Pb-Pb collisions at the LHC

Abstract

Many data in the High Energy Physics are, in fact, sample means. It is shown that when this exact meaning of the data is taken into account and the most weakly bound states are removed from the hadron resonance gas, the whole spectra of pions, kaons and protons measured at midrapidity in Pb-Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV can be fitted simultaneously. The invariant distributions are predicted with the help of the single-freeze-out model in the chemical equilibrium framework. The method is applied to the measurements in centrality bins of Pb-Pb collisions and gives acceptable fits for all but peripheral bins. The comparison with the results obtained in the framework of the original single-freeze-out model is also presented. Some more general, possible implications of this approach are pointed out.

7 pages, 7 figures. arXiv admin note: substantial text overlap with arXiv:1508.07922, matches the published version

References in corpus (4)

• Big-Bang Nucleosynthesis
• Hadron yields and the phase diagram of strongly interacting matter
• Finite resonance widths influence the thermal-model description of hadron yields
• Effects of $\rho$-meson width on pion distributions in heavy-ion collisions

Cited by in corpus (4)

• Effective (kinetic freeze-out) temperature, transverse flow velocity and kinetic freeze-out volume in high energy collisions
• Energy density at kinetic freeze-out in Pb-Pb collisions at the LHC using the Tsallis distribution
• Kinetic freeze-out in central heavy-ion collisions between 7.7 and 2760 GeV per nucleon pair
• Dependence of temperatures and kinetic freeze-out volume on centrality in Au-Au and Pb-Pb collisions at high energy