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Relativistic direct Urca processes in cooling neutron stars

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Relativistic direct Urca processes in cooling neutron stars

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dc.contributor.author Leinson, L.B.
dc.contributor.author Pérez Cañellas, Armando
dc.date.accessioned 2014-02-19T11:36:55Z
dc.date.available 2014-02-19T11:36:55Z
dc.date.issued 2001
dc.identifier.citation Leinson, L.B. Pérez Cañellas, Armando 2001 Relativistic direct Urca processes in cooling neutron stars Physics Letters B 518 1-2 15 22
dc.identifier.uri http://hdl.handle.net/10550/33092
dc.description.abstract We derive a relativistic expression for neutrino energy losses caused by the direct Urca processes in degenerate baryon matter of neutron stars. We use two different ways to calculate the emissivity caused by the reactions to our interest. First we perform a standard calculation by Fermi's 'golden' rule. The second calculation, resulting in the same expression, is performed with the aid of polarization functions of the medium. Our result for neutrino energy losses strongly differs from previous nonrelativistic results. We also discuss nonconservation of the baryon vector current in reactions through weak charged currents in the medium, when the asymmetry between protons and neutrons is considered. The above effects, not discussed in the literature before, substantially modify the polarization functions responsible for the induced weak charged currents in baryon matter.
dc.relation.ispartof Physics Letters B, 2001, vol. 518, num. 1-2, p. 15-22
dc.subject Física
dc.title Relativistic direct Urca processes in cooling neutron stars
dc.type journal article es_ES
dc.date.updated 2014-02-19T11:36:56Z
dc.identifier.doi 10.1016/S0370-2693(01)01042-5
dc.identifier.idgrec 093315
dc.rights.accessRights open access es_ES
dc.identifier.url 10.1016/S0370-2693(01)01042-5

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