Acoustic neutrino detection is a promising approach to instrument the large detector volumes needed for the detection of the small neutrino fluxes expected at ultra-high energies (E 1 EeV). We report on several studies investigating the feasibility of such an acoustic detector. High-precision lab measurements using laser and proton beams aiming at the verification of the thermo-acoustic model h...

The success of the AMANDA neutrino telescope has shown that the ice sheet at the geographical South Pole is a suitable medium for optical Cherenkov detection of high energy neutrino interactions. Several thousands of atmospheric neutrinos have been recorded by AMANDA and the sensitivity for cosmic neu-trinos has continuously improved. So far no cosmic neutrino signals have been detected. The de...

GRB941017, a gamma-ray burst of exceptional fluence, has recently been shown to have a high-energy component which is not consistent with the standard fireball phenomenology. If this component is the result of photomeson interactions in the burst fireball, it provides new and compelling support for substantial high-energy neutrino fluxes from this and similar sources. In this letter, we conside...

The prospects of measuring the leptonic angles and CP-odd phases at a neutrino factory are discussed in the scenario of three active plus one sterile neutrino. We consider the νμ → νe LSND signal. Its associated large mass difference leads to observable neutrino oscillations at short (∼ 1 km) baseline experiments. Sensitivities to the leptonic angles down to 10 can be easily achieved with a 1 T...

There exists a considerable amount of research claiming a puzzling anti-correlation between the neutrino detection rate at the Homestake experiment and indicators of solar activity such as the sunspot number, giving rise to explanations involving the hypothesis of a neutrino magnetic moment. It is argued here that the claimed significant anti-correlation is due to a statistical fallacy. A prope...

The precision and discovery potential of a neutrino factory based on muon storage rings is summarized. For three-family neutrino oscillations, we analyze how to measure or severely constraint the angle θ13, CP violation, MSW effects and the sign of the atmospheric mass difference ∆m223. The appearance of “wrong-sign muons” at three reference baselines is considered: 732 km, 3500 km and 7332 km....

The construction of large-volume detectors of high energy, greater than 1TeV, neutrinos is mainly driven by the search for extragalactic neutrino sources. The existence of such sources is implied by the observations of ultra-high-energy, greater than or equal to 1019eV, cosmic rays, the origin of which is a mystery. In this lecture, I briefly discuss the expected extragalactic neutrino signal a...

Neutralino dark matter, and in particular different aspects of its detection at neutrino telescopes, has been studied within the Minimal Supersymmetric extension of the Standard Model, the MSSM. The relic density of neutralinos has been calculated using sophisticated routines for integrating the annihilation cross section and the Boltzmann equation. As a new element, so called coannihilation pr...

The ν̄e → π−π0 and νe+ → π+π0 reactions have a resonant structure whenever the energy of the s–channel equals the mass of a JP = 1 vector meson. The resonant cross sections are of the order 10−38 cm2 and correspond to cosmic ray antineutrino energies in the range 0.20 to 2.00 TeV. A similar structure occurs in the annihilation of cosmic ray antineutrinos with a relic (background) neutrino. For m...

The recent progress made in Galactic γ-ray astronomy using the High Energy Stereoscopic System (H.E.S.S.) instrument provides for the first time a population of Galactic TeV γ-ray, and hence potential neutrino sources, for which the neutrino flux can be estimated. Using the energy spectra and source morphologies measured by H.E.S.S., together with new parameterisations of pion production and de...