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Seasonal dependence in the solar neutrino flux

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Seasonal dependence in the solar neutrino flux

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De Holanda, Pedro Cunha; Peña Garay, Carlos; González García, Mª Concepción; Furtado Valle, José Wagner

Aquest document és un/a article, creat/da en: 1999

Mikheyev-Smirnov-Wolfenstein (MSW) solutions of the solar neutrino problem predict a seasonal dependence of the zenith angle distribution of the event rates, due to the nonzero latitude at the Super-Kamiokande site. We calculate this seasonal dependence and compare it with the expectations in the no-oscillation case as well as just-so scenario, in the light of the latest Super-Kamiokande 708-day data. The seasonal dependence can be sizable in the large mixing angle MSW solution and would be correlated with the day-night effect. This may be used to discriminate between MSW and just-so scenarios and should be taken into account in refined fits of the data.

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