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2016

Echo Technique to Distinguish Flavors of Astrophysical Neutrinos

Li, Shirley Weishi, Bustamante, Mauricio, Beacom, John F.

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The flavor composition of high-energy astrophysical neutrinos is a rich observable.

However, present analyses cannot effectively distinguish particle showers induced by $\nu_e$ versus $\nu_\tau$.
We show that this can be accomplished by measuring the intensities of the delayed, collective light emission from muon decays and neutron captures, which are, on average, greater for $\nu_\tau$ than for $\nu_e$.
This new technique would significantly improve tests of the nature of astrophysical sources and of neutrino properties.

Echo Technique to Distinguish Flavors of Astrophysical Neutrinos · Around

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