Physics
Scientific paper
Apr 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994phrvd..49.3910g&link_type=abstract
Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 49, Issue 8, 15 April 1994, pp.3910-3917
Physics
3
Elementary Particle Processes, Non-Standard-Model Neutrinos, Right-Handed Neutrinos, Etc., Neutron Stars
Scientific paper
Energy loss due to wrong helicity sterile neutrinos through spin flip processes leads to rapid cooling of nascent neutron stars. The observed cooling of neutron stars associated with SN 1987A seems to preclude the existence of Dirac neutrinos with a mass in excess of 20 keV. Assuming that nuclear matter in the core of the neutron star undergoes a phase transition to quark matter leading to a strange star or a neutron star with a strange matter core, we examine the emission of flipped Dirac neutrinos for two dominant processes: quark-neutrino scattering [q+ν-(ν¯+)-->q+ν+(ν¯-)] and the quark neutrino pair bremsstrahlung process [q+q-->q+q+ν-ν¯-(ν+ν¯+)]. We determine the composition of quark matter just after core bounce and examine the effect of neutrino degeneracy on the emission rate and mean free path of the wrong helicity neutrinos.
Dutta Sukanta
Goyal Ashok
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