منابع مشابه
Shadowing of Ultrahigh Energy Neutrinos
The rise with energy of the neutrino–nucleon cross section implies that at energies above few TeV the Earth is becoming opaque to cosmic neutrinos. The neutrinos interact with the nucleons through the weak charged current, resulting into absorption, and the weak neutral current, which provides a redistribution of the neutrino energy. We Mellin transform the neutrino transport equation and find ...
متن کاملSignature Neutrinos from Ultrahigh-energy Photons
At high red shift, the temperature of cosmic microwave background is sufficiently high for the ultrahighenergy photons to pair-produce muons and pions through interactions with the background photons. At the same time, the radio background and magnetic fields are too weak to drain energy out of the electromagnetic cascade before the muons and pions are produced. Decays of the energetic muons an...
متن کاملUltrahigh Energy Cosmic Rays and Neutrinos
We discuss the relation between the highest energy cosmic rays (UHECR) and UHE neutrinos. The neutrinos produced in the sources of optically thin astrophysical sources have been linked to the UHECR emissivity of the Universe. The fluxes of cosmogenic neutrinos, generated in propagation by UHECR, also reflect the acceleration of these particles, the maximum acceleration energy, and the cosmologi...
متن کاملUltrahigh Energy Neutrinos and the Highest Energy Cosmic Rays
It has been suggested that the characteristic energy of string models may be considerably lower than the observed Planck mass (≈ 10GeV). In such schemes, the unification of interactions takes place around the string scale, perhaps as low as a few tens of TeV. Consequently, at energies above the string scale, neutrinos acquire interactions comparable in strength to strong interactions. While the...
متن کاملPropagation of ultrahigh-energy neutrinos through the Earth
The dispersion relation in matter of ultrahigh-energy neutrinos above the pole of the W resonance (Eν ∼ 10 GeV), is studied. We perform our calculation using the real-time formulation of Thermal Field Theory in which the massless limit for the W boson is taken. The range of active-to-sterile neutrino oscillation parameters for which there is significant mixing enhancement during propagation thr...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1996
ISSN: 0370-2693
DOI: 10.1016/0370-2693(96)00948-3