Cosmological Constraints on Neutrino Injection

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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.
33 pages, 23 figures

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High Energy Physics - Phenomenology, Astrophysics

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http://salesiana.dossiersoluciones.com/handle/123456789/186075

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0705.1200
 http://arxiv.org/abs/0705.1200
 Phys.Rev.D76:105017,2007
 doi:10.1103/PhysRevD.76.105017

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arXiv