Low-Mass $e^+e^-$ Pairs from in-Medium $ρ$ Meson Propagation

Details Low-Mass $e^+e^-$ Pairs from in-Medium $ρ$ Meson Propagation Low-Mass $e^+e^-$ Pairs from in-Medium $ρ$ Meson Propagation

1997-01-30

arxiv.org/abs/nucl-th/9701064v1

Physics

Nuclear Physics

Nuclear Theory

9 pages LaTeX, postscript figures included using epsf.sty, epsfig.sty; Proc. of the Int. Workshop XXV, Hirschegg '97, on 'QCD

Scientific paper

Based on a realistic model for the rho meson in free space we investigate it's medium modifications in a hot hadron gas generated by hadronic rescattering processes, i.e. renormalization of intermediate two-pion states as well as direct rho meson scattering off hadrons. Within the vector dominance model the resulting in-medium rho spectral function is applied to calculate $e^+e^-$ spectra as recently measured in heavy-ion collisions at CERN-SpS energies in the CERES experiment.

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