Cosmological constraints on neutrino injection
Abstract
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.
- Publication:
-
Physical Review D
- Pub Date:
- November 2007
- DOI:
- arXiv:
- arXiv:0705.1200
- Bibcode:
- 2007PhRvD..76j5017K
- Keywords:
-
- 14.80.-j;
- 26.35.+c;
- 95.85.Ry;
- 98.70.Vc;
- Other particles;
- Big Bang nucleosynthesis;
- Neutrino muon pion and other elementary particles;
- cosmic rays;
- Background radiations;
- High Energy Physics - Phenomenology;
- Astrophysics
- E-Print:
- 33 pages, 23 figures