A decay of the ultra-high-energy neutrino ν_e → e^- W⁺ in a magnetic field and its influence on the shape of the neutrino spectrum

2010/10/04 by A. V. Kuznetsov, Kuznetsov, A. V., N. V. Mikheev +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #High Energy Physics - Phenomenology (hep-ph) #astro-ph.HE #hep-ph

paper · pdf · doi:10.48550/arxiv.1010.0582

8 pages, LaTeX, 2 EPS figures, based on the talk presented by A.V. Kuznetsov at the XVI International Seminar Quarks'2010, Kolomna, Moscow Region, June 6-12, 2010, to appear in the Proceedings

arxiv created 2010/10/04 · arxiv updated 2010/10/05

Abstract

The width of the neutrino decay into the electron and W boson in a strong external magnetic field is obtained from the imaginary part of the neutrino self-energy. This result corrects the formulae existing in the literature. The mean free path of an ultra-high energy neutrino in a strong magnetic field is calculated. An energy cutoff for neutrinos propagating in a strong field is defined.

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