TY - JOUR
T1 - Low-m⊥ π+-π- asymmetry enhancement from hadronization of QGP
AU - Letessier, Jean
AU - Tounsi, Ahmed
AU - Rafelski, Johann
N1 - Funding Information:
Supported in part by a grant from the US Department of Energy, DE-FG03-95ER40937 . LPTHE, Univ. Paris 6 et 7 is: Unité mixte de Recherche du CNRS, UMR7589.
PY - 2000/3/2
Y1 - 2000/3/2
N2 - We show that in sudden hadronization of QGP a non-equilibrium value of the pion phase space occupancy parameter γq> 1 is expected in order to accommodate the entropy excess in QGP and the process of gluon fragmentation. When γq is near to its maximum allowed value, pion overabundance is shown to arise at low m⊥, where the charged pion asymmetry is also amplified. These effects are considered and we show that their magnitude suffices to explain pertinent experimental data obtained in 160-200 A GeV Pb- and S- induced reactions.
AB - We show that in sudden hadronization of QGP a non-equilibrium value of the pion phase space occupancy parameter γq> 1 is expected in order to accommodate the entropy excess in QGP and the process of gluon fragmentation. When γq is near to its maximum allowed value, pion overabundance is shown to arise at low m⊥, where the charged pion asymmetry is also amplified. These effects are considered and we show that their magnitude suffices to explain pertinent experimental data obtained in 160-200 A GeV Pb- and S- induced reactions.
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U2 - 10.1016/S0370-2693(00)00088-5
DO - 10.1016/S0370-2693(00)00088-5
M3 - Article
AN - SCOPUS:85037487469
SN - 0370-2693
VL - 475
SP - 213
EP - 219
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 3-4
ER -