Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-10-11
JCAP 0506 (2005) 013
Physics
High Energy Physics
High Energy Physics - Phenomenology
To be published in JCAP
Scientific paper
10.1088/1475-7516/2005/06/013
Extraterrestrial neutrinos can initiate deeply developing air showers, and those that traverse the atmosphere unscathed may produce cascades in the ice or water. Up to now, no such events have been observed. This can be translated into upper limits on the diffuse neutrino flux. On the other hand, the observation of cosmic rays with primary energies > 10^{10} GeV suggests that there is a guaranteed flux of cosmogenic neutrinos, arising from the decay of charged pions (and their muon daughters) produced in proton interactions with the cosmic microwave background. In this work, armed with these cosmogenic neutrinos and the increased exposure of neutrino telescopes we bring up-to-date model-independent upper bounds on the neutrino-nucleon inelastic cross section. Uncertainties in the cosmogenic neutrino flux are discussed and taken into account in our analysis. The prospects for improving these bounds with the Pierre Auger Observatory are also estimated. The unprecedented statistics to be collected by this experiment in 6 yr of operation will probe the neutrino-nucleon inelastic cross section at the level of Standard Model predictions.
Anchordoqui Luis A.
Fodor Zoltan
Katz Sandor D.
Ringwald Andreas
Tu Huitzu
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