The Impact of Excited Neutrinos on νν¯→γγ Process

الملخص EN

We examine the effect of excited neutrinos on the annihilation of relic neutrinos with ultrahigh energy cosmic neutrinos for the νν¯→γγ process.

The contributions 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 obtained value of the Standard Model with the impact of excited neutrinos.