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arXiv · hep-ph/9508353

Medium Modifications of the Rho Meson at CERN/SPS Energies

R. Rapp·G. Chanfray·J. Wambach
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Abstract

Rho meson propagation in hot hadronic matter is studied in a model with coupling to $ππ$ states. Medium modifications are induced by a change of the pion dispersion relation through collisions with nucleons and $Δ's$ in the fireball. Maintaining gauge invariance dilepton production is calculated and compared to the recent data of the CERES collaboration in central S+Au collisions at 200 GeV/u. The observed enhancement of the rate below the rho meson mass can be largely accounted for.

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R. Rapp, G. Chanfray, J. Wambach. 1995-08-23. Medium Modifications of the Rho Meson at CERN/SPS Energies. https://doi.org/10.1103/physrevlett.76.368

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