High-energy neutrino conversion into electron-W pair in magnetic field and its contribution to neutrino absorption

Abstract

We calculate the conversion rate of high-energy neutrinos propagating in constant magnetic field into an electron-W pair (nu -> W + e) from the imaginary part of the neutrino self-energy. Using the exact propagators in constant magnetic field, the neutrino self-energy has been calculated to all order in the field within the Weinberg-Salam model. We obtain a compact formula in the limit of B << Bcr = m^2/e. We find that above the process threshold Eth \~ 2.2 10^16 (Bcr / B) eV this contribution to the absorption of neutrinos yields an asymptotic absorption length ~ 1.1 (Bcr / B)^2 (10^{16} eV / E) meters.

10 pages in RevTeX, 2 figures; published version: two typos corrected, one reference added

References in corpus (4)

• Neutrino-photon reactions in astrophysics and cosmology
• Neutrino self-energy and dispersion in a medium with magnetic field
• Neutrino self-energy in a magnetized medium in arbitrary $\xi$-gauge
• Neutrino transitions nu -> nu gamma, nu -> nu e+ e- in a strong magnetic field as a possible origin of cosmological gamma-burst

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• Charged massive vector boson propagator in a constant magnetic field in arbitrary $\xi$-gauge obtained using the modified Fock-Schwinger method
• Propagators of charged particles in an external magnetic field, expanded over Landau levels
• A study of neutral particle decay in magnetic field with the "Worldline Instanton" approach
• Position-space representation of charged particles' propagators in a constant magnetic field as an expansion over Landau levels