Probing New Physics With Neutrino Interactions At The Pierre Auger Observatory

Details Probing New Physics With Neutrino Interactions At The Pierre Auger Observatory Probing New Physics With Neutrino Interactions At The Pierre Auger Observatory

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..857..326d&link_type=abstract

PARTICLES AND FIELDS: X Mexican Workshop on Particles and Fields. AIP Conference Proceedings, Volume 857, pp. 326-329 (2006).

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Neutrino Interactions, Neutrino, Muon, Pion, And Other Elementary Particle Detectors, Cosmic Ray Detectors

Scientific paper

The energy of the shower produced through neutrino-nucleon interactions depends on the neutrino flavor and the type of interaction. Electron neutrinos undergoing CC interactions produce a shower with both an electromagnetic and hadronic component: Esh,em=(1-y)Ev, Esh,had=yEv. Muon neutrinos undergoing CC interactions, along with all neutrino flavors undergoing NC interactions, produce a hadronic shower with an energy, Esh,had=Ev. Charged current interactions of tau neutrino are somewhat more complicated. The tau lepton produced in the initial CC neutrino interaction with sufficiently high energy generate a second hadronic shower from the tau decay spatially separated from the initial one, identifiable as a ``double bang'' event. The Auger capability for seeing these events allows to restrict models where non-perturbative effects are present, which induce an enhancement in the neutrino-nucleon cross-section (e.g. low-scale Quantum Gravity, EW instantons). We are interested to study EW-instantons, both the Standard Model as well as in an extension of the type SU(2)1 × SU(2)2 × U(1)Y, where the influence of new physics is only in the third family.

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