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Echo Technique to Distinguish Flavors of Astrophysical Neutrinos
Shirley Weishi Li1,2, Mauricio Bustamante1,2, John F Beacom1,2,3
1Center for Cosmology and AstroParticle Physics (CCAPP), Ohio State University, Columbus, Ohio 43210.
Abstract:
The flavor composition of high-energy astrophysical neutrinos is a rich observable. However, present analyses cannot effectively distinguish particle showers induced by ν_{e} vs ν_{τ}. 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 ν_{τ} than for ν_{e}. This new technique would significantly improve tests of the nature of astrophysical sources and of neutrino properties. We discuss the promising prospects for implementing it in IceCube and other detectors.
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