Pion broadening and low-mass dilepton production

Details Pion broadening and low-mass dilepton production Pion broadening and low-mass dilepton production

2003-03-14

arxiv.org/abs/hep-ph/0303131v1

Phys.Part.Nucl.Lett. 1 (2004) 70-75

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 5 figures

Scientific paper

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.

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