The recent results of solar neutrino measurements in Super-Kamiokande

TL;DR

This paper reports on solar neutrino measurements from Super-Kamiokande, demonstrating its ability to analyze flux, spectrum, and time variations, and confirming the Large Mixing Angle solution with high confidence.

Contribution

It provides the first phase results of Super-Kamiokande's solar neutrino data and a global analysis confirming the LMA solution at 98.1% confidence.

Findings

Super-Kamiokande measures solar neutrino flux, spectrum, and time variations.

The global analysis confirms the Large Mixing Angle solution at 98.1% confidence.

Current status of the second phase of Super-Kamiokande is discussed.

Abstract

The results of solar neutrino data from the first phase of Super-Kamiokande are presented. Super-Kamiokande can measure not only the solar neutrino flux but also its energy spectrum and its time variations such as day vs night and seasonal differences. This information can severely restrict parameters of solar neutrino oscillation. From the combination of several experiments' results with those of Super-K, the Large Mixing Angle solution is uniquely allowed at the 98.1% confidence level; this global solar neutrino oscillation analysis is presented. The current status of the second phase of Super-Kamiokande is presented.