Relic neutrino asymmetries and big bang nucleosynthesis in a four neutrino model

Details Relic neutrino asymmetries and big bang nucleosynthesis in a four neutrino model Relic neutrino asymmetries and big bang nucleosynthesis in a four neutrino model

1998-05-08

arxiv.org/abs/hep-ph/9805259v2

Phys.Rev.D58:105010,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 1 figure, minor changes, to appear in Physical Review D

Scientific paper

10.1103/PhysRevD.58.105010

Oscillations between ordinary and sterile neutrinos can generate large neutrino asymmetries in the early universe. These asymmetries can significantly affect big bang nucleosynthesis (BBN) through modification of nuclear reaction rates. We study this phenomenon within a model consisting of the three ordinary neutrinos plus one sterile neutrino that can be motivated by the neutrino anomalies and the dark matter problem. We calculate how the lepton asymmetries produced evolve at temperatures where they impact on BBN. The effect of the asymmetries on primordial helium production is determined, leading to an effective number of neutrino flavours during BBN of either about 2.7 or 3.1 depending on the sign of the lepton asymmetry.

Affiliated with

Also associated with

No associations

Rating

Relic neutrino asymmetries and big bang nucleosynthesis in a four neutrino model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Relic neutrino asymmetries and big bang nucleosynthesis in a four neutrino model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Relic neutrino asymmetries and big bang nucleosynthesis in a four neutrino model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-202568