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Two-pion annihilation into pairs in relativistic non-linear models

โœ Scribed by J. Pastor; J.C. Caillon; J. Labarsouque


Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
336 KB
Volume
757
Category
Article
ISSN
0375-9474

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โœฆ Synopsis


We have studied the ฯ€ + ฯ€ -โ†’ 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 ฯ€ + ฯ€ -โ†’ ฯ โ†’ e + e -dilepton production rate in the low invariant mass region as required by the experimental data.


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