1203.5881 (S. C. Inan et al.)

The impact of excited neutrinos on $ν\barν\to γγ$
process    [PDF]

S. C. Inan, M. Koksal

We examine the effect of excited neutrinos on the annihilation of relic neutrinos with ultra high energy cosmic neutrinos for the $\nu \bar{\nu}\to \gamma\gamma$ process. The contribution of the excited neutrinos to the neutrino-photon decoupling temperature are calculated. We see that photon-neutrino decoupling temperature can be significantly reduced below the QCD phase transition with the impact of excited neutrinos.

View original: http://arxiv.org/abs/1203.5881