Neutrino telescopes as a probe of broken μ-τ symmetry

Details Neutrino telescopes as a probe of broken μ-τ symmetry Neutrino telescopes as a probe of broken μ-τ symmetry

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007nuphs.168..274x&link_type=abstract

Nuclear Physics B Proceedings Supplements, Volume 168, p. 274-276.

Physics

Nuclear Physics

4

Scientific paper

The ultrahigh-energy (UHE) neutrinos produced from a distant astrophysical source must oscillate many times on the way to the Earth. Assuming the conventional UHE neutrino source with the flavor ratio ϕ:ϕ:ϕ=1:2:0, I show that ϕeD:ϕμD:ϕτD=(1-2Δ):(1+Δ):(1+Δ) holds at the detector of a km3-size neutrino telescope, where Δ signifies the effect of μ-τ symmetry breaking (i.e., θ≠0 and θ≠π/4). Current neutrino oscillation data yield -0.1⩽Δ⩽+0.1. I point out that it is also possible to probe Δ by detecting the ν flux of E≈6.3 PeV via the Glashow resonance channel νe→W→anything.

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