Abstract
We examine the effect of excited neutrinos on the annihilation of relic neutrinos with ultrahigh energy cosmic neutrinos for theνν¯→γγprocess. 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.
Highlights
According to standard cosmology, neutrinos are probably one of the most abundant particles of the universe
The universe is filled with a sea of relic neutrinos that decoupled from the rest of the matter within the first few seconds after the Big Bang
Weiler 1 have shown that the UHE cosmic neutrinos may interact with relic neutrinos via the following reactions occurring on the Z resonance: νcosmic νrelic −→ Z −→ nucleons photons
Summary
Neutrinos are probably one of the most abundant particles of the universe. The universe is filled with a sea of relic neutrinos that decoupled from the rest of the matter within the first few seconds after the Big Bang. It is excessively difficult to measure relic neutrinos since the interactions of their cross-sections with matter are tremendously suppressed. Weiler 1 have shown that the UHE cosmic neutrinos may interact with relic neutrinos via the following reactions occurring on the Z resonance: νcosmic νrelic −→ Z −→ nucleons photons. In such an event, a UHE cosmic neutrino has energy Eν ≈ 1023 eV. The interaction of relic neutrinos and UHE cosmic neutrinos would have significant cross-section
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
