Cosmological Neutrino Mass Limit Revisited

Details Cosmological Neutrino Mass Limit Revisited Cosmological Neutrino Mass Limit Revisited

1992-11-25

arxiv.org/abs/hep-ph/9211307v1

Phys.Lett.B301:376-381,1993

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages (2 figures available on request), NORDITA-92/87 P

Scientific paper

10.1016/0370-2693(93)91166-K

We consider the equilibration of the 'wrong--helicity' Dirac neutrino states $\nu_{+}$ and $\overline\nu_{-}$ in the early Universe via weak interactions and calculate carefully the thermally averaged production rate, taking into account all the relevant scattering and decay processes. Requiring that the production rate is less than the Hubble parameter at the onset of QCD phase transition so that the nucleosynthesis predictions are not contradicted, we find for $T_{\rm{QCD}}\simeq 200$ MeV the upper limits $m_{\nu_\tau}\lsim 740$ keV and $m_{\nu_\mu}\lsim 480$ keV.

Affiliated with

Also associated with

No associations

Rating

Cosmological Neutrino Mass Limit Revisited 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 Cosmological Neutrino Mass Limit Revisited, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmological Neutrino Mass Limit Revisited will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-617601