Decaying neutrinos: The long way to isotropy

Details Decaying neutrinos: The long way to isotropy Decaying neutrinos: The long way to isotropy

2009-11-09

arxiv.org/abs/0911.1771v4

Phys.Rev.D81:123503,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Updated to match published version in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.81.123503

We investigate a scenario in which neutrinos are coupled to a pseudoscalar degree of freedom $\ph$ and where decays $\nu_1 \to \nu_2+\ph$ and inverse decays are the responsible mechanism for obtaining equilibrium. In this context we discuss the implication of the invisible neutrino decay on the neutrino-pseudoscalar coupling constant and the neutrino lifetime. Assuming the realistic scenario of a thermal background of neutrinos and pseudoscalar we update the bound on the (off-diagonal) neutrino-pseudoscalar coupling constant to $g<2.6\times10^{-13}$ and the bound on the neutrino lifetime to $\tau<1\times10^{13}\,\rm{s}$. Furthermore we confirm analytically that kinetic equilibrium is delayed by two Lorentz $\ga$--factors -- one for time dilation of the (decaying) neutrino lifetime and one from the opening angle. We have also confirmed this behavior numerically.

Affiliated with

Also associated with

No associations

Rating

Decaying neutrinos: The long way to isotropy 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 Decaying neutrinos: The long way to isotropy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Decaying neutrinos: The long way to isotropy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-50492