A 'soft + hard' model for heavy-ion collisions

10th International Workshop on High-pT Physics in the RHIC/LHC Era

Urmossy, K.^1 ; Barnaföldi, G.G.^1 ; Harangozó, Sz.^1,2 ; Biró, T.S.^1 ; Xu, Z.^3

Wigner Research Center for Physics, Hungarian Academy of Sciences, 29-33 Konkoly-Thege Miklós Str., Budapest

H-1121, Hungary^1

Eötvös University, 1/a Pázmány Péter Walkway, Budapest

H-1117, Hungary^2

Physics Department, Brookhaven National Laboratory, Upton

NY

11973, United States^3

关键词: Heavy ion collision;    Model calculations;    Neutral pions;    Pb-Pb collisions;    Perturbative quantum chromodynamics;    Quark-gluon plasma;    Statistical modeling;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/805/1/012010/pdf
DOI  :  10.1088/1742-6596/805/1/012010

来源: IOP

【 摘 要 】

We describe the spectra of neutral pions stemming from AuAu collisions at s = 200 AGeV in a 'soft + hard' model. The model is based on the assumptions that hadrons stemming from hard processes are described via perturbative quantum chromodynamics improved parton model calculations, while those stemming from the Quark-Gluon Plasma (we refer to as soft yields) can be described in a super-statistical model induced by multiplicity uctuations. The obtained dependence of the parameters of the model on the event centrality is compared to what is observed in PbPb collisions at p s = 2.76 ATeV.