Radial Flow from Electromagnetic Probes and Signal of Quark Gluon Plasma

Details Radial Flow from Electromagnetic Probes and Signal of Quark Gluon Plasma Radial Flow from Electromagnetic Probes and Signal of Quark Gluon Plasma

2009-10-26

arxiv.org/abs/0910.4856v2

Phys. Rev. C 82, 034901 (2010)

Physics

Nuclear Physics

Nuclear Theory

One LaTeX and 9 eps files, to appear in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.82.034901

A first attempt has been made to extract the evolution of radial flow from the analysis of the experimental data on electromagnetic probes experimentally measured at SPS and RHIC energies. The $p_T$ spectra of photons and dileptons measured by WA98 and NA60 collaborations respectively at CERN-SPS and the photon spectra obtained by PHENIX collaboration at BNL-RHIC have been used to constrain the theoretical models, rendering the outcome of the analysis largely model independent. We argue that the variation of the radial velocity with invariant mass is indicative of a phase transition from initially produced partons to hadrons at SPS and RHIC energies.

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