Matter-affected neutrino oscillations in ordinary and mirror stars and their implications for gamma-ray bursts

Abstract

It has been proposed that the annihilation process $\nu \bar{\nu }\to e^{-}{e}^{+}\to \gamma \gamma$ may be responsible for the generation of gamma-ray bursts (GRBs). The incipient neutrino--antineutrino pairs carry virtually all of the gravitational binding energy available from the central engine. However, gamma-ray bursters proposed to date are inevitably surrounded by an excess of baryons, leading to the "baryon-loading problem". In the light of growing evidence for neutrino oscillations, we discuss the implications of matter-affected oscillations for GRB energetics, and on the viability of "mirror" stars as GRB progenitors.

Comments: 12 pages, RevTeX