Astrophysical Searches for Exotic Phenomena in Ultrahigh Energy Neutrino–nucleon Scattering *
نویسنده
چکیده
We investigate the potential of near–future neutrino telescopes like NESTOR for searches for exotic processes in ultrahigh energy neutrino–quark scattering. We consider signatures such as muon bundles and/or contained cascades from the nonperturbative production of multiple weak gauge bosons in the Standard Model, compositeness and leptoquark production.
منابع مشابه
Strong Neutrino - Nucleon Interactions at Ultrahigh Energies as a Solution to the Gzk Puzzle ∗
After a short review of the ultrahigh energy cosmic ray puzzle – the apparent observation of cosmic rays originating from cosmological distances with energies above the expected Greisen-Zatsepin-Kuzmin cutoff 4 × 10 19 eV – we consider strongly interacting neutrino scenarios as an especially interesting solution. We show that all features of the ultrahigh energy cosmic ray spectrum from 10 17 e...
متن کاملUltra - High Energy Neutrino - Nucleon Scattering and Parton Distributions at Small x
The cross section for ultra-high energy neutrino-nucleon scattering is very sensitive to the parton distributions at very small values of Bjorken x (x ≤ 10−4). We numerically investigate the effects of modifying the behavior of the gluon distribution function at very small x in the DGLAP evolution equation. We then use the Color Glass Condensate formalism to calculate the neutrino-nucleon cross...
متن کاملObservation of Ultrahigh Energy Neutrino Interactions by Orbiting Detectors
The study of extraterrestrial, ultrahigh energy neutrinos is important from at least two points of view. First, they probably carry astrophysical information about point sources which are optically thick at (almost) all wavelengths, for instance, an active galactic nucleus (AGN). Second, incoming neutrinos of laboratory energies of the order of 10eV (or even higher) are expected to be emitted b...
متن کاملUltrahigh-Energy Neutrino-Nucleon Cross Sections and Perturbative Unitarity
Unitarity relates the total cross section for neutrino-nucleon scattering to the neutrino-nucleon forward scattering amplitude. Assuming the validity of the perturbative expansion of the forward amplitude in the weak coupling constant, we derive a unitarity bound on the inelastic cross section. The inelastic cross section saturates this bound at a typical neutrino energy Eν ≃ 108 GeV. This impl...
متن کاملCollider versus Cosmic Ray Sensitivity to Black Hole Production
In scenarios with extra dimensions and TeV-scale quantum gravity, black holes are expected to be produced copiously at center-of-mass energies above the fundamental Planck scale. The Large Hadron Collider (LHC) may thus turn into a factory of black holes, at which their production and evaporation may be studied in detail. But even before the LHC starts operating, the Pierre Auger Observatory fo...
متن کامل