Search for anti-electron-neutrinos from the Sun at Super-Kamiokande-I

TL;DR

This study searches for anti-electron-neutrinos from the Sun using Super-Kamiokande-I data, setting upper limits on their flux and conversion probability, with no significant detection observed.

Contribution

First to set experimental upper limits on solar anti-electron-neutrino flux and conversion probability using Super-Kamiokande-I data.

Findings

No significant excess of anti-electron-neutrinos detected

Set upper limit of 0.8% on conversion probability

Established flux limits for 10-17 MeV anti-neutrinos

Abstract

We present the results of a search for low energy $\bar{\nu}_e$ from the Sun using 1496 days of data from Super-Kamiokande-I. We observe no significant excess of events and set an upper limit for the conversion probability to $\bar{\nu}_e$ of the $^8$B solar neutrino. This conversion limit is 0.8% (90% C.L.) of the standard solar model's neutrino flux for total energy = 8 MeV -- 20 MeV. We also set a flux limit for monochromatic $\bar{\nu}_e$ for $E_{\bar{\nu}_e}$ = 10 MeV -- 17 MeV.