Spectral Function of rho in Dense and Hot Hadronic Matter
Ji-sheng Chen, Jia-rong Li, Peng-fei Zhuang
Abstract
The spectral function of rho meson in hot/dense hadronic matter is studied by taking into account the nucleon-loop on quantum hadrondynamics model level. Different from the hot pion gas effect which changes the spectral function slightly, the nucleon-antinucleon polarization (Dirac sea) makes the spectral function very sharp and shifted towards the low invariant mass region significantly due to the decreasing effective nucleon mass.
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