INTERNATIONAL JOURNAL OF MODERN PHYSICS A, cilt.27, 2012 (SCI İndekslerine Giren Dergi)
We examine the impact of electromagnetic properties of neutrinos on the annihilation of relic neutrinos with ultrahigh energy cosmic neutrinos for the nu(nu) over bar -> gamma gamma process. For this process, photon-neutrino decoupling temperature is calculated via effective Lagrangian model beyond the standard model. We find that photon-neutrino decoupling temperature can be importantly reduced below the QCD phase transition with the model independent analysis defining electromagnetic properties of neutrinos.