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

Abstract

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.

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

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Cited by in corpus (7)

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• $\varphi$ Production in In-In Collisions at 158 AGeV
• Role of phi decays for K- yields in relativistic heavy-ion collisions
• $K^{\ast 0}$ meson production using a transport and a statistical hadronization model at energies covered by the RHIC beam energy scan
• A comparative measurement of $\varphi \to K^{+}{K}^{-}$ and $\varphi \to {\mu }^{+}{\mu }^{-}$ in In-In collisions at the CERN SPS
• Effect of in-medium mass-shift on transverse-momentum spectrum and elliptic anisotropy of $\varphi$ meson
• Phi meson production in In-In collisions at $E_{\mathrm{lab}}$=158$A$ GeV: evidence for relics of a thermal phase