In-medium vector meson properties and low-mass dilepton production from hot hadronic matter

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  • 17 January 2002
Abstract
The in-medium properties of the vector mesons are known to be modified significantly in hot and dense hadronic matter due to vacuum polarisation effects from the baryon sector in the Walecka model. The drop in the vector meson mass in the medium is due to the Dirac sea whose effect is taken into account through the summing of the baryonic tadpole diagrams in the relativistic Hartree approximation (RHA). In the present work, we study the properties of the vector mesons in hot and dense matter, including the quantum correction effects from the baryon as well as scalar meson sectors in a nonperturbative formalism. These medium modifications of the properties of the vector mesons are reflected, through the shifting and broadening of the respective peaks, in the low mass dilepton spectra, and have been the subject of the present investigation.

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