Low-Mass Dileptons from in-Medium Hadronic Interactions

Details Low-Mass Dileptons from in-Medium Hadronic Interactions Low-Mass Dileptons from in-Medium Hadronic Interactions

1998-04-24

arxiv.org/abs/nucl-th/9804065v1

Physics

Nuclear Physics

Nuclear Theory

Proceedings of 33rd Recontres de Moriond, Les Arcs, France, March 23-27 1998; 6 pages LaTeX, 3ps-/eps-figures, including morio

Scientific paper

Medium Effects in low-mass dilepton production in ultra-relativistic heavy-ion collisions are investigated using hadronic models. The rescattering of pions and rho mesons within a hot and dense hadron gas leads to substantial modifications in the $\pi^+\pi^- \to e^+ e^-$ annihilation process, which are shown to be important for understanding the recently observed dilepton enhancement at the CERN-SpS. Possible implications for the nature of the chiral phase transition are outlined.

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