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Pion broadening and low-mass dilepton production

We determine mass and transverse momentum spectra of dileptons produced in Pb+Au (158 GeV/u) collisions within a pion annihilation model. A fit to the data requires simultaneous mass reduction and broadening of the in-medium rho propagator. The introduction of a finite pion width, as required within self-consistent approaches to the interacting pion gas, further improves the agreement with the data.

preprint2003arXivOpen access
H. -J. SchulzeD. Blaschke
hep-ph
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Open access2 authors1 topic
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H. -J. SchulzeD. Blaschke

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