English

Cosmic UHE Neutrino Signatures

Astrophysics 2009-11-07 v2

Abstract

Utilizing the unique and reliable ultrasmall--xx predictions of the dynamical (radiative) parton model, nominal event rates and their detailed energy dependence caused by a variety of cosmic UHE neutrino fluxes are calculated and analyzed. In addition, maximal Regge--model inspired small--xx structure functions are employed for obtaining optimal rates which do not necessarily require `new' physics interpretations. Upward μ++μ\mu^+ +\mu^- event rates are estimated by taking into account total and nadir--angle dependent regeneration effects due to neutral current interactions. For exploring extragalactic neutrino sources at highest energies (\raisebox{-0.1cm}{>\stackrel{>}{\sim}} 10810^8 GeV) with modern (future) ground--level telescopes, we analyze horizontal air shower event rates and shower events caused by Earth--skimming tau--neutrinos, in particular their detailed shower-- and cosmic neutrino--energy dependence. As an illustration of `new physics' implications we estimate the relevant horizontal air shower event rates due to spin--2 Kaluza--Klein `graviton' exchanges in neutral current neutrino--quark and neutrino--gluon interactions at low TeV--scales.

Keywords

Cite

@article{arxiv.astro-ph/0303252,
  title  = {Cosmic UHE Neutrino Signatures},
  author = {K. Giesel and J. -H. Jureit and E. Reya},
  journal= {arXiv preprint arXiv:astro-ph/0303252},
  year   = {2009}
}

Comments

3 figures changed, discussions and references added