https://doi.org/10.1140/epja/i2006-10048-2
Heavy Ion Physics
Medium effects on φ decays to dilepton and kaon-antikaon pairs in relativistic heavy ion reactions
Institut für Theoretische Physik, Universität Tübingen, Auf der Morgenstelle 14, D-72076, Tübingen, Germany
* e-mail: gerhard.burau@uni-tuebingen.de
Received:
27
February
2006
Accepted:
16
May
2006
Published online:
16
June
2006
We consider the role of rescattering of secondary kaons on the dilepton branching ratio of the φ-meson. In-medium mass modifications and broadening of kaons and φ-mesons are taken into account. We find in the framework of a Bjorken scenario for the time evolution of the expanding fireball that the φ 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.
PACS: 25.75.-q Relativistic heavy-ion collisions – / 14.40.Aq π, K, and η mesons – / 14.40.Ev Other strange mesons – / 13.75.Lb Meson-meson interactions –
© Società Italiana di Fisica and Springer-Verlag, 2006
