Neutrino flavour conversion strongly suppresses the diffuse neutrino background from neutrino-dominated accretion flows if the neutrino mass ordering is inverted, leaving a detectable signal only in the normal ordering.
Neutrino-Dominated Accretion Models for Gamma-Ray Bursts: Effects of General Relativity and Neutrino Opacity
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abstract
We first refine the fixed concept in the literature that the usage of the Newtonian potential in studies of black hole accretion is invalid and the general relativistic effect must be considered. As our main results, we then show that the energy released by neutrino annihilation in neutrino-dominated accretion flows is sufficient for gamma-ray bursts when the contribution from the optically thick region of the flow is included, and that in the optically thick region advection does not necessarily dominate over neutrino cooling because the advection factor is relevant to the geometrical depth rather than the optical depth of the flow.
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Impact of Neutrino Flavour Conversion on the Diffuse Neutrino Background from Neutrino-dominated Accretion Flows
Neutrino flavour conversion strongly suppresses the diffuse neutrino background from neutrino-dominated accretion flows if the neutrino mass ordering is inverted, leaving a detectable signal only in the normal ordering.