Phi Meson Propagation and Decay at Finite Temperature

Details Phi Meson Propagation and Decay at Finite Temperature Phi Meson Propagation and Decay at Finite Temperature

2004-04-23

arxiv.org/abs/nucl-th/0404069v1

Acta Phys.Hung. A24 (2005) 283-289

Physics

Nuclear Physics

Nuclear Theory

7 pages, 3 postscript figures, Talk given at the 20th Winter Workshop on Nuclear Dynamics, Trelawny Beach, Jamaica, 15-20 Marc

Scientific paper

10.1556/APH.24.2005.1-4.39

We study spectral properties of the phi meson at finite temperature using an effective Lagrangian together with finite-temperature field theory as a basis for modeling. General field-theoretic arguments are then used to establish the lifetime of the phi in hot hadronic matter. We find from the model, and we therefore propose a scenario in which, the phi decays inside the fireball. Early decays into $\mu^{+}\mu^{-}$ occur at high temperature while measurable hadronic decays into $K^{+}K^{-}$ (not suffering rescattering) occur at freezeout, where flow could be substantial. These results provide a consistent picture, if not possible interpretation of the NA49 and NA50 data from CERN.

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