Weak and Electromagnetic Nuclear Decay Signatures for Neutrino Reactions in SuperKamiokande

Abstract

We suggest the study of events in the SuperKamiokande neutrino data due to charged- and neutral-current neutrino reactions followed by weak and/or electromagnetic decays of struck nuclei and fragments thereof. This study could improve the prospects of obtaining evidence for $\tau$ production from ${\nu }_{\mu }\to {\nu }_{\tau }$ oscillations and could augment the data sample used to disfavor ${\nu }_{\mu }\to {\nu }_{sterile}$ oscillations.

Comments: 7 pages, latex, to appear in Phys. Rev. Lett