Spectral Red-Shift Versus Broadening from Photon and Dilepton Spectra

Details Spectral Red-Shift Versus Broadening from Photon and Dilepton Spectra Spectral Red-Shift Versus Broadening from Photon and Dilepton Spectra

2001-06-18

arxiv.org/abs/nucl-th/0106038v2

Phys.Rev.C67:054901,2003

Physics

Nuclear Physics

Nuclear Theory

Title and contents changed

Scientific paper

10.1103/PhysRevC.67.054901

We estimate the photon and dilepton emission rates from hot hadronic matter with in-medium spectral shift and broadening of vector mesons. It is observed that both the WA98 photon data and CERES/NA45 dilepton data can be well reproduced with similar initial conditions. The freeze-out condition has been constrained by the transverse mass spectra of pions and protons measured by the NA49 collaboration. We argue that simultaneous measurement of the $p_T$ spectra of single photons as well as invariant mass distribution of dileptons is crucial to understand the in-medium spectral function of the vector mesons.

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