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Can there be neutrino oscillations in a gamma-ray burst fireball?

Sarira Sahu and Juan Carlos D'Olivo

  • Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Apartado Postal 70-543, 04510 Mexico DF, Mexico

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Phys. Rev. D 71, 047303 – Published 10 February, 2005

DOI: https://doi.org/10.1103/PhysRevD.71.047303

Abstract

The central engine which powers the gamma-ray burst 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 is possible for the oscillations of νe↔νμ,τ, νe↔νs, and ν¯μ,τ↔ν¯s if the neutrino mass square difference and mixing angle are in the atmospheric and/or Liquid Scintillator Neutrino Detector 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.

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Phys. Rev. D 71, 047303– Published 10 February, 2005
  • Received 8 September 2004

© 2005 American Physical Society

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