A Circumstantial Evidence for the Possible Production of QGP in the 158A GeV/c Central Pb+Pb Collisions

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dc.creatorLiu, Zhiyi
dc.creatorSa, Benhao
dc.creatorZhou, Shuhua
dc.date2004-04-22
dc.date.accessioned2026-07-07T03:52:22Z
dc.date.available2026-07-07T03:52:22Z
dc.descriptionHadron and string cascade model (JPCIAE) with the hypothesis without introducing the quark-gluon plasma (QGP), is employed to study the direct photon and $π^0$ transverse momentum distributions for central $^{208}$Pb+$^{208}$Pb collisions at 158A GeV/c . JPCIAE model, is based on LUND model, especially on the envent generator PYTHIA, and can be used to simulate the relativistic nucleus-nucleus collisions where PYTHIA is called to deal with hadron-hadron collisions. In our work, the theoretical results of transverse momentum distribution for both the direct photon and the $π^0$ particle are lower than the data of WA98 experiment. However, JPCIAE model can ever explain successfully the results of WA80 and WA93 experiments of central S+Au collisions at 200A GeV/c where no evidence of direct photon excess. Having considered the results of WA80 and WA93 experiments can be explained but WA98's can't, that might provide a circumstantial evidence for the possible production of QGP in the high-energy central Pb+Pb collisions.
dc.description4 pages, 2 figures
dc.identifierhttps://arxiv.org/abs/hep-ph/0404200
dc.identifierhttp://arxiv.org/abs/hep-ph/0404200
dc.identifierHigh Energy Phys.Nucl.Phys. 25 (2001) 1089-1091
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/43443
dc.subjectHigh Energy Physics - Phenomenology
dc.titleA Circumstantial Evidence for the Possible Production of QGP in the 158A GeV/c Central Pb+Pb Collisions
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