Neutrino, Photon Interaction in Unparticle Physics

Abstract

We investigate the impact of unparticle physics on the annihilation of relic neutrinos with the neutrinos identified as primary source of ultra high energy (UHE) cosmic ray events, producing a cascade of photons and charged particles. We compute the contribution of the unparticle exchange to the cross-sections $\nu \bar{\nu }\to \gamma \gamma$ and $\nu \bar{\nu }\to f\bar{f}$ scattering. We estimate the neutrino photon decoupling temperature from the reaction rate of $\nu \bar{\nu }\to \gamma \gamma$. We find that inclusion of unparticles can in fact account for the flux of UHE cosmic rays and can also result in the lowering of neutrino - photon decoupling temperature below the QCD phase transition for unparticle physics parameters in a certain range. We calculate the mean free path of these high energy neutrinos annihilating themselves with the relic neutrinos to produce vector and tensor unparticles.

11 pages, 3 figures

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Cited by in corpus (6)

• Vector unparticle enhanced black holes: exact solutions and thermodynamics
• Constraining Unparticles from Top Physics at TeVatron
• Neutrino-2008: Where are we? Where are we going?
• Indian Contributions to LHC Theory
• The impact of excited neutrinos on $\nu \bar{\nu }\to \gamma \gamma$ process
• The effect of electromagnetic properties of neutrinos on the photon-neutrino decoupling temperature