Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-09-17
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, 10 figures, revised version
Scientific paper
Using the opacity expansion technique we investigate the photon radiation and dilepton production induced by multiple rescattering as energetic parton jet passing through the strong interacting medium. The real photon radiation and dilepton invariant-mass spectrums of the bremsstrahlung contribution from an energetic quark jet are presented. The leading contribution of total energy loss by photon emmision in medium of a higher energy quark jet is found to be proportional to the jet energy and has a linear dependence on the thickness of the nuclear target. The rescattering contribution for the dilepton is important only for small value of the invariant-mass and for the not so fast jet. The contribution fraction of the dilepton induced by rescattering in medium is found to be nearly a constant when the ratio of jet energy to Debye screening mass $E/\mu$ is large.
Kang Zhongbo
Wang Enke
Zhang Ben-Wei
Zhang Hanzhong
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