Low-Momentum Pion Enhancement from Schematic Hadronization of a Gluon-Saturated Initial State
Autor: | Elizaveta Nazarova, Tobias Fischer, Łukasz Juchnowski, David Blaschke |
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Jazyk: | angličtina |
Rok vydání: | 2019 |
Předmět: |
Nuclear Theory
High Energy Physics::Lattice Hadron FOS: Physical sciences 01 natural sciences Nuclear Theory (nucl-th) Nuclear physics Momentum Boltzmann equation High Energy Physics - Phenomenology (hep-ph) Pion ALICE pion enhancement 0103 physical sciences lcsh:Nuclear and particle physics. Atomic energy. Radioactivity 010306 general physics Nuclear Experiment Physics thermalization Large Hadron Collider 010308 nuclear & particles physics High Energy Physics::Phenomenology Gluon Hadronization High Energy Physics - Phenomenology Phase space lcsh:QC770-798 High Energy Physics::Experiment LHC gluon saturation hadronization |
Zdroj: | Particles, Vol 2, Iss 1, Pp 140-149 (2019) |
Popis: | We study the particle production in the early stage of the ultrarelativistic heavy-ion collisions. To this end the Boltzmann kinetic equations for gluons and pions with elastic rescattering are considered together with a simple model for the parton-hadron conversion process (hadronisation). It is shown that the overpopulation of the gluon phase space in the initial state leads to an intermediate stage of Bose enhancement in the low-momentum gluon sector which due to the gluon-pion conversion process is then reflected in the final distribution function of pions. This pattern is very similar to the experimental finding of a low-momentum pion enhancement in the ALICE experiment at the CERN Large Hadron Collider (LHC). Relations to the thermal statistical model of hadron production and the phenomenon of thermal and chemical freeze-out are discussed in this context. |
Databáze: | OpenAIRE |
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