Medium effects on phi decays to dilepton and kaon-antikaon pairs in relativistic heavy ion reactions

Details Medium effects on phi decays to dilepton and kaon-antikaon pairs in relativistic heavy ion reactions Medium effects on phi decays to dilepton and kaon-antikaon pairs in relativistic heavy ion reactions

2006-05-18

arxiv.org/abs/nucl-th/0605041v1

Eur.Phys.J. A28 (2006) 187-192

Physics

Nuclear Physics

Nuclear Theory

6 pages with 2 figures, accepted for publication in Eur. Phys. J. A

Scientific paper

10.1140/epja/i2006-10048-2

We consider the role of rescattering of secondary kaons on the dilepton branching ratio of the phi meson. In-medium mass modifications and broadening of kaons and phi mesons are taken into account. We find in the framework of a Bjorken scenario for the time evolution of the expanding fireball that the phi yield from dimuons is moderately or at least only slightly enhanced compared to that from kaon-antikaon pairs. The relation to experimental yields measured by the NA49, NA50 and CERES Collaborations at CERN SPS and the PHENIX Collaboration at RHIC is discussed.

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