Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2000-12-20
Physics
Nuclear Physics
Nuclear Theory
6 pages, 2 figures. To appear in the Proceedings of "Bologna 2000: Structure of the Nucleus at the Dawn of the Century",May 29
Scientific paper
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.
Dieperink A. E. L.
Korchin Alexandr
Timmermans Rob
van Dalen} N. E. E.
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