Constraints on diffuse neutrino background from primordial black holes

Details Constraints on diffuse neutrino background from primordial black holes Constraints on diffuse neutrino background from primordial black holes

2000-05-14

arxiv.org/abs/astro-ph/0005295v3

Phys.Rev. D65 (2002) 123005

Astronomy and Astrophysics

Astrophysics

18 pages,(with 7 figures)

Scientific paper

10.1103/PhysRevD.65.123005

We calculated the energy spectra and the fluxes of electron neutrino emitted in the process of evaporation of primordial black holes (PBHs) in the early universe. It was assumed that PBHs are formed by a blue power-law spectrum of primordial density fluctuations. We obtained the bounds on the spectral index of density fluctuations assuming validity of the standard picture of gravitational collapse and using the available data of several experiments with atmospheric and solar neutrinos. The comparison of our results with the previous constraints (which had been obtained using diffuse photon background data) shows that such bounds are quite sensitive to an assumed form of the initial PBH mass function.

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