Emissivity and Mean-free Paths of Neutrinos in Neutron Star Matter via Modified Urca Processes

摘要

The modified Urca processes are the most effective weak interactionsthat produce neutrinos in neutron star medium. Emissivity and mean-freepath of electron neutrinos arising from the neutron branch of the modifiedUrca process are calculated supposing the neutron star matter is a betastable one. The effect of strong nuclear interactions on the rate of thisweak interaction is taken into account through the pair nuclear densitydependentcorrelation functions adapted from the lowest-order constrainedvariational (LOCV) method using the AV18 two-body potential.