Medium Modifications of the Rho Meson at CERN/SPS Energies

Details Medium Modifications of the Rho Meson at CERN/SPS Energies Medium Modifications of the Rho Meson at CERN/SPS Energies

1995-08-23

arxiv.org/abs/hep-ph/9508353v1

Phys.Rev.Lett. 76 (1996) 368-371

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages RevTeX and 2 figures (uuencoded .ps-files)

Scientific paper

10.1103/PhysRevLett.76.368

Rho meson propagation in hot hadronic matter is studied in a model with coupling to $\pi\pi$ states. Medium modifications are induced by a change of the pion dispersion relation through collisions with nucleons and $\Delta's$ 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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