The Sun, neutrinos and Super-Kamiokande.

Proceedings of the Japan Academy. Series B, Physical and Biological Sciences
Yoichiro Suzuki

Abstract

In the standard model of elementary particle physics neutrinos are massless, and therefore the actuality of finite neutrino mass indicates a theory beyond the standard model. The Sun produces abundant neutrinos due to nuclear fusion reactions. A pioneering experiment in the early '70s detected neutrinos from the Sun, but found that the observed flux was smaller than expected, which was then called the missing solar neutrino problem. Tremendous efforts were made both experimentally and theoretically to solve this problem. In 2001, almost 30 years after the first indication, data from Super-Kamiokande in Japan and SNO in Canada together provided evidence that neutrino oscillation effectively converts the solar (electron) neutrinos to non-electron type neutrinos. Neutrino oscillation can occur only for those neutrinos with finite neutrino mass.

References

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May 20, 2020·Journal of Zhejiang University. Science. B·Qin ZhangYuan-Qiang Lu

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Methods Mentioned

BETA
electron capture
electron scattering
chemical extraction
SMA
neutron capture

Software Mentioned

OPAL
SAGE
Super
KamLAND
Hyper
Homestake
QBEE
GALLEX

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