Cosmic UHE Neutrino Signatures

Authors:
K. Giesel,
J.-H. Jureit,
E. Reya

Comments: LateX, 29 pages, 7 Tables, 10 Figures. Figure 8 is modified by
psfrag.sty. arydshln.sty is necessary and included in tar-file

Report-no: DO-TH 2003/03

Utilizing the unique and reliable ultrasmall–$x$ 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–$x$
structure functions are employed for obtaining optimal rates which do not
necessarily require `new’ physics interpretations. Upward $mu^+ +mu^-$ 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
(
aisebox{-0.1cm}{$stackrel{>}{sim}$} $10^8$ 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.

References and citations for this submission:

SLAC-SPIRES HEP (refers to ,
cited by, arXiv reformatted)