Mass shift, width broadening and spectral density of rho-mesons produced in heavy ion collisions
V.L.Eletsky(University of Erlangen-Nuremberg), B.L.Ioffe(ITEP) and, J.I.Kapusta(University of Minnesota)
TL;DR
This paper investigates how rho-mesons produced in heavy ion collisions experience mass shifts and broadening of their spectral density, affecting their resonance identity.
Contribution
It provides a summary of recent findings on rho-meson modifications, highlighting significant broadening and spectral changes in heavy ion collision environments.
Findings
Mass shift of a few tens of MeV
Width and spectral density become very broad
Rho-mesons may lose their resonance identity
Abstract
Our recent work on modifications of rho-mesons formed at the last stage of evolution of hadronic matter produced in heavy ion collisions is summarized. It is found that while the mass shift is on the order of a few tens of MeV, the width and spectral density become so broad that rho may lose its identity as a well defined resonance.
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