Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-02-04
Phys.Rev.D71:047303,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, two column text, To be published in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.71.047303
The central engine which powers the Gamma-Ray Burst (GRB) fireball, produces neutrinos in the energy range of about 5-20 MeV. Fractions of these neutrinos may propagate through the fireball which is far away from the central engine. We have studied the propagation of these neutrinos through the fireball which is contaminated by baryons and have shown that, resonant conversion of neutrinos are possible for the oscillations of nu_e to nu_{mu,tau}, nu_e to nu_s and anti-nu_(mu,tou) to anti-nu_s if the neutrino mass square difference and mixing angle are in the atmospheric and/or LSND range. On the other hand it is probably difficult for neutrinos to have resonant oscillation if the neutrino parameters are in the solar neutrino range. From the resonance condition we have estimated the fireball temperature and the baryon load in it.
D'Olivo Juan Carlos
Sahu Sarira
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