Signal for supernova ${\nu }_{\mu }$ and ${\nu }_{\tau }$ neutrinos in water Čerenkov detectors

Abstract

We suggest that photons with energies between 5 and 10 MeV, generated by the ($\nu ,{\nu }^{\prime }p\gamma$) and ($\nu ,{\nu }^{\prime }n\gamma$) reactions on ${}^{16}$O, constitute a signal which allows a unique identification of supernova ${\nu }_{\mu }$ and ${\nu }_{\tau }$ neutrinos in water Čerenkov detectors. We calculate the yield of such $\gamma$ events and estimate that a few hundred of them would be detected in Superkamiokande for a supernova at 10 kpc distance.

8 pages, RevTex 3.0, figures and text available at http://www.krl.caltech.edu/preprints/MAP.html

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