Flash of prompt photons from the early stage of heavy-ion collisions
作者:
Dinesh Kumar Srivastava,
期刊:
AIP Conference Proceedings
(AIP Available online 1999)
卷期:
Volume 482,
issue 1
页码: 142-155
ISSN:0094-243X
年代: 1999
DOI:10.1063/1.59569
出版商: AIP
数据来源: AIP
摘要:
We briefly recall the tremendous strides in the studies of the parton cascade model made by Klaus Geiger. Next, we argue that photons may provide confirmation of several of these ideas. Thus we know that, copious internetted partonic cascades may develop in the wake of relativistic collisions of nuclei at CERN SPS and BNL RHIC energies, We use the parton cascade model to estimate the emission of single photons generated from such cascades due to the branching of quarksq→q&ggr;,scattering of quarks and gluons, and annihilation of quarks. The formation of a hot and dense partonic matter is shown to be preceded by an intense radiation of photons from the QED branching of quarks. This is similar to the QCD branchingq→qgwhich along with the gluon multiplication(g→gg)which is known to play a crucial role in the formation of the dense partonic plasma. ©1999 American Institute of Physics.
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