Searches for possible day-night and semiannual variations of the B8 solar neutrino flux are reported based on 1040 days of Kamiokande-II data. Within statistical error, no such short-time variations were observed. The limit on the day-night difference sets a constraint on neutrino-oscillation parameters. A region defined by sin22, >0.02 and 2×10-6m2-10-5 eV2 is excluded at 90% C.L. without any assumption on the absolute value of the expected solar neutrino flux.
ASJC Scopus subject areas
- Physics and Astronomy(all)