Single Freeze-Out, Statistics and Pion, Kaon and Proton Production in Central Pb-Pb Collisions at $\sqrt{s_{NN}}=2.76$ TeV

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 acceptable fit to the whole spectra of pions, kaons and protons measured at midrapidity in central Pb-Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV [Phys.Rev.Lett.109,252301(2012)] is obtained. The invariant distributions are predicted with the help of the single-freeze-out model in the chemical equilibrium framework. Low $p_T$ pions and protons are reproduced simultaneously as well as $p/\pi$ ratio. Additionally, correct predictions extend over lower parts of large $p_T$ data. Some more general, possible implications of this approach are pointed out.

10 pages, 2 figures, matches published version

References in corpus (6)

• Hadron yields and the phase diagram of strongly interacting matter
• Multiplicity fluctuations due to the temperature fluctuations in high-energy nuclear collisions
• Cancellation of the sigma meson in thermal models
• The Tsallis Distribution at Large Transverse Momenta
• Transverse-momentum spectra of strange particles produced in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV in the chemical non-equilibrium model
• Reconstructing the final state of Pb+Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV

Cited by in corpus (9)

• Effective (kinetic freeze-out) temperature, transverse flow velocity and kinetic freeze-out volume in high energy collisions
• Fluctuations as a test of chemical non-equilibrium at the LHC
• Pion quasiparticles and QCD phase transitions at finite temperature and isospin density from holography
• Kinetic freeze-out in central heavy-ion collisions between 7.7 and 2760 GeV per nucleon pair
• QCD phase diagram at finite isospin chemical potential and temperature in an IR-improved soft-wall AdS/QCD model
• Pion condensation in a soft-wall AdS/QCD model
• Structure formation during phase transitions in strongly interacting matter
• Fluctuations in non-ideal pion gas with dynamically fixed particle number
• Centrality dependence of freeze-out temperature fluctuations in Pb-Pb collisions at the LHC