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Solar-Neutrino Variations: A Manifestation of Nonzero Neutrino Mass and Magnetic Moment, and Mixing.

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Title: Solar-Neutrino Variations: A Manifestation of Nonzero Neutrino Mass and Magnetic Moment, and Mixing.
Authors: Dorman, L. I.
Source: Physics of Atomic Nuclei. Jun2000, Vol. 63 Issue 6, p984. 5p.
Subjects: Solar neutrinos, Neutrino mass
Abstract: Time variations of solar neutrino flux are investigated on the basis of available Homestake experimental data for more than two solar cycles (1970-1994). At first, we determine (with the weight-time function by taking into account [sup 37]Ar decay), for each solar neutrino run n, the effective Earth's heliolatitude L[sub eff](n), the effective Zurich sunspots number Z[sub eff](n), the effective latitude of sunspots distribution Λ[sub eff](n), and the effective surfaces of sunspots in different heliolatitude belts. Then, we consider the correlation of solar-electron-neutrino fluxes with these parameters for different periods of solar activity. It is found that correlation coefficients change sign in different periods of solar activity, so that for total period 1970-1994 the correlation coefficient is very small. The obtained information indicates that a neutrino should have nonzero mass and nonzero magnetic moment. [ABSTRACT FROM AUTHOR]
Copyright of Physics of Atomic Nuclei is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Time variations of solar neutrino flux are investigated on the basis of available Homestake experimental data for more than two solar cycles (1970-1994). At first, we determine (with the weight-time function by taking into account [sup 37]Ar decay), for each solar neutrino run n, the effective Earth's heliolatitude L[sub eff](n), the effective Zurich sunspots number Z[sub eff](n), the effective latitude of sunspots distribution Λ[sub eff](n), and the effective surfaces of sunspots in different heliolatitude belts. Then, we consider the correlation of solar-electron-neutrino fluxes with these parameters for different periods of solar activity. It is found that correlation coefficients change sign in different periods of solar activity, so that for total period 1970-1994 the correlation coefficient is very small. The obtained information indicates that a neutrino should have nonzero mass and nonzero magnetic moment. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Physics of Atomic Nuclei is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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