Cosmological Constraints on Neutrino Injection

Details Cosmological Constraints on Neutrino Injection Cosmological Constraints on Neutrino Injection

2007-05-09

arxiv.org/abs/0705.1200v1

Phys.Rev.D76:105017,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

33 pages, 23 figures

Scientific paper

10.1103/PhysRevD.76.105017

We derive general constraints on the relic abundances of a long-lived particle which mainly decays into a neutrino (and something else) at cosmological time scales. Such an exotic particle may show up in various particle-physics models based on physics beyond the standard model. The constraints are obtained from big-bang nucleosynthesis, cosmic microwave background and diffuse neutrino and photon fluxes, depending on the lifetime and the electromagnetic and hadronic branching ratios.

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