The highest energy neutrinos: First evidence for cosmic origin
نویسندگان
چکیده
منابع مشابه
Ultrahigh 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...
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Measurements of the arrival directions of cosmic rays have not revealed their sources. High energy neutrino telescopes attempt to resolve the problem by detecting neutrinos whose directions are not scrambled by magnetic fields. The key issue is whether the neutrino flux produced in cosmic ray accelerators is detectable. It is believed that the answer is affirmative, both for the galactic and ex...
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We present the results of a new estimation of the photodisintegration and propagation of ultrahigh energy cosmic-ray (UHCR) nuclei in intergalactic space. The critical interactions for energy loss and photodisintegration of UHCR nuclei occur with photons of the infrared background radiation (IBR). We have reexamined this problem making use of a new determination of the IBR based on empirical da...
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In this paper we show that the conventional diffusive shock acceleration mechanism for cosmic rays associated with relativistic astrophysical shocks in active galactic nuclei (AGNs) has severe difficulties to explain the highest energy cosmic ray events. We show that protons above around 2 × 10 eV could have marginally been produced by this mechanism in an AGN or a rich galaxy cluster not furth...
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 2014
ISSN: 0004-6337
DOI: 10.1002/asna.201412058