Fluctuations as a test of chemical nonequilibrium at energies available at the CERN Large Hadron Collider

Viktor Begun


It is shown that large chemical potential leads to the significant increase of multiplicity fluctuations for bosons, and makes the fluctuations infinite in the case of Bose-Einstein condensation. It allows us to distinguish between the models that explain the anomalous proton to pion ratio and the low transverse momentum enhancement of pion spectra in Pb+Pb collisions at the Large Hadron Collider within chemical equilibrium or nonequilibrium models. The effects of resonance decays, finite size of the system, requirements to the event statistics, different momentum cuts, and limited detector acceptance are considered. The obtained results show the possibility to observe a substantial increase of the normalized kurtosis for positively or negatively charged pions in the case of nonequilibrium or partial pion condensation using currently measured data.

Author Viktor Begun (FP / NPD)
Viktor Begun,,
- Nuclear Physics Division
Journal seriesPhysical Review C, ISSN 2469-9985, e-ISSN 2469-9993, [1538-4497]
Issue year2016
ASJC Classification3106 Nuclear and High Energy Physics
Languageen angielski
Score (nominal)45
Score sourcejournalList
ScoreMinisterial score = 35.0, 10-06-2020, ArticleFromJournal
Ministerial score (2013-2016) = 45.0, 10-06-2020, ArticleFromJournal
Publication indicators Scopus Citations = 16; WoS Citations = 14; WoS Impact Factor: 2016 = 3.82 (2) - 2016=3.676 (5)
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