Nuclear Theory
[Submitted on 20 Dec 2000]
Title:Cooling of Neutron Stars Revisited: Application of Low Energy Theorems
View PDFAbstract: Cooling of neutrons stars proceeds mainly via neutrino emission;
As an example we study the modified neutrino bremsstrahlung process $nn \to nn\nu\bar{\nu}.$
The radiated energy is small compared to other scales in the system.
Hence one can use low-energy theorems to compute the neutrino emissivity in terms of the non-radiative process, ie the on-shell $T$ matrix. We find that the use of the $T-$matrix as compared to previous estimates based upon one pion exchange leads a substantial reduction of the predicted emissivity.
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