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Two-pion annihilation into e+e−pairs in relativistic non-linear models
Langue
en
Article de revue
Ce document a été publié dans
Nuclear Physics A. 2005, vol. 757, p. 456-475
Elsevier
Résumé en anglais
We have studied the $\pi^{+}\pi^{-} \rightarrow e^+e^-$ process in dense and hot nuclear matter using relativistic non-linear models taking into account all scalar–vector coupling terms up to fourth order in the Lagrangian. ...Lire la suite >
We have studied the $\pi^{+}\pi^{-} \rightarrow e^+e^-$ process in dense and hot nuclear matter using relativistic non-linear models taking into account all scalar–vector coupling terms up to fourth order in the Lagrangian. We have determined the influence of non-linear terms on the cross section and dilepton production rate in both isoscalar and isovector channels. For one of the models considered, we have found an enhancement of the $\pi^+\pi^- \rightarrow \rho \rightarrow {e^+e^-}$ dilepton production rate in the low invariant mass region as required by the experimental data.< Réduire
Mots clés en anglais
Nuclear matter
Relativistic hadronic models
Dilepton production rate
Origine
Importé de halUnités de recherche