Cosmogenic Neutrinos and New Physics Signal at Neutrino Telescopes
- CAFPE, Universidad de Granada, 18071 Granada (Spain)
- INFN, Universita degli Studi di Roma 'La Sapienza', 00185 Rome (Italy)
Cosmogenic neutrinos reach the Earth with energies around 109 GeV, and their interactions with matter will be measured in upcoming experiments (Auger, IceCube). Models with extra dimensions and the fundamental scale at the TeV could imply signals in these experiments. In particular, besides the production of microscopic black holes by cosmogenic neutrinos, gravity-mediated interactions at larger distances (that can be calculated in the eikonal approximation) can take place. In these processes a neutrino of energy Ev interacts elastically with a parton inside a nucleon, loses a small fraction y of its energy, and starts a hadronic shower of energy yEv << Ev. We show that for the expected fluxes of cosmogenic neutrinos these elastic processes give a stronger signal than black hole production in neutrino telescopes and that the energy distribution of contained hadronic showers can help to distinguish between eikonal and black hole or Standard Model events. On the other hand, the absence of any signal at IceCube would imply a bound of MD > or approx. 5 TeV.
- OSTI ID:
- 20719480
- Journal Information:
- AIP Conference Proceedings, Vol. 794, Issue 1; Conference: IFAE 2005: 17. Italian meeting on high energy physics, Catania (Italy), 30 Mar - 2 Apr 2005; Other Information: DOI: 10.1063/1.2125664; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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