High-Energy Astrophysical Neutrino Decay

Details High-Energy Astrophysical Neutrino Decay High-Energy Astrophysical Neutrino Decay

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aps..apr.p9010b&link_type=abstract

American Physical Society, April Meeting, 2003, April 5-8, 2003 Philadelphia, Pennsylvania, MEETING ID: APR03, abstract #P9.010

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Existing limits on the non-radiative decay of one neutrino to another plus a massless particle (e.g., a singlet Majoron) are very weak. The best limits on the lifetime to mass ratio come from solar neutrino observations, and are τ/m agt 10-4 s/eV for the relevant mass eigenstate(s). For lifetimes even several orders of magnitude longer, high-energy neutrinos from distant astrophysical sources would decay. This would strongly alter the flavor ratios from the φ_ν_e:φ_ν_μ:φ_ν_τ = 1:1:1 expected from oscillations alone, and should be readily visible in the near future in detectors such as IceCube.

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