Summary
A way to estimate photino contamination in neutrino flux from supernova is suggested. By comparing the experimental and theoretically expected ratios of forward-peaked events in the direction of neutrino source and isotropic events one can set a limit on selectron mass. As an example the data from SN 1987A have been used to set a limit on selectron mass.
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Babu, P.R., Chhabra, T. A way to limit selectron mass using supernova neutrino data. Nuov Cim A 105, 387–393 (1992). https://doi.org/10.1007/BF02730642
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DOI: https://doi.org/10.1007/BF02730642