Solar neutrino results in Super-Kamiokande-III

By K. Abe, Y. Hayato, T. Iida, M. Ikeda, C. Ishihara, K. Iyogi, J. Kameda, K. Kobayashi, Y. Koshio, Y. Kozuma and 112 more. 2010

364 citations recorded by the source corpus.

The results of the third phase of the Super-Kamiokande solar neutrino measurement are presented and compared to the first and second phase results. With improved detector calibrations, a full detector simulation, and improved analysis methods, the systematic uncertainty on the total neutrino flux is estimated to be {+-}2.1%, which is about two thirds of the systematic uncertainty for the first phase of Super-Kamiokande. The observed {sup 8}B solar flux in the 5.0 to 20 MeV total electron energy region is 2.32{+-}0.04(stat){+-}0.05(sys)x10{sup 6} cm{sup -2} sec{sup -1} under the assumption of pure electron-flavor content, in agreement with previous measurements. A combined oscillation analysis is carried out using SK-I, II, and III data, and the results are also combined with the results of other solar neutrino experiments. The best-fit oscillation parameters are obtained to be sin{sup 2}{theta}{sub 12}=0.30{sub -0.01}{sup +0.02}(tan{sup 2}{theta}{sub 12}=0.42{sub -0.02}{sup +0.04}) and {Delta}m{sub 21}{sup 2}=6.2{sub -1.9}{sup +1.1}x10{sup -5} eV{sup 2}. Combined with KamLAND results, the best-fit oscillation parameters are found to be sin{sup 2}{theta}{sub 12}=0.31{+-}0.01(tan{sup 2}{theta}{sub 12}=0.44{+-}0.03) and {Delta}m{sub 21}{sup 2}=7.6{+-}0.2x10{sup -5} eV{sup 2}. The {sup 8}B neutrino flux obtained from global solar neutrino experiments is 5.3{+-}0.2(stat+sys)x10{sup 6} cm{sup -2} s{sup -1}, while the {sup 8}B flux becomes 5.1{+-}0.1(stat+sys)x10{supmore » 6} cm{sup -2} s{sup -1} by adding KamLAND results. In a three-flavor analysis combining all solar neutrino experiments, the upper limit of sin{sup 2}{theta}{sub 13} is 0.060 at 95% C.L.. After combination with KamLAND results, the upper limit of sin{sup 2}{theta}{sub 13} is found to be 0.059 at 95% C.L.« less

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/38d492989073eadc47e74e4eec17a4f5394e324e

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Nuclear and High Energy Physics

Citations in the corpus

2020 global reassessment of the neutrino oscillation picture (2020, methodology): “[39] Super-Kamiokande Collaboration, K.”
Neutrino Oscillations and Non-standard Interactions (2017, background): “After its ﬁrst three solar phases [46–48], Super-Kamiokande is already in its fourth phase, where a very low energy detection threshold of 3.5 MeV has been achieved [49].”
Updated fit to three neutrino mixing: status of leptonic CP violation (2014, methodology): “For real-time experiments we include the results from on electron scattering (ES) from the four phases in Super-Kamiokande: the 44 data points of the phase I (SK1) energy-zenith spectrum [22], the 33 (42) data points of the full energy and day/night spectrum in phase II (III), SK2 [23] (SK3 [24]), a”
Global Analyses of Neutrino Oscillation Experiments (2015, background): “• atmospheric neutrinos, in particular in the high-statistics results of Super-Kamiokande [4]; • event rates of solar neutrino radiochemical experiments Chlorine [5], Gallex/GNO [6] and SAGE [7], as well as time and energy dependent rates from the four phases in Super-Kamiokande [8–11], the three ph”
Updated fit to three neutrino mixing: exploring the accelerator-reactor complementarity (2016, background): “• SK3 full energy and day/night spectrum [20], 42 data points.”
The fate of hints: updated global analysis of three-flavor neutrino oscillations (2020, background): “• SK3 full energy and day/night spectrum [42], 42 data points.”
Global analysis of three-flavour neutrino oscillations: synergies and tensions in the determination of θ23, δCP, and the mass ordering (2018, background): “• SK3 full energy and day/night spectrum [63], 42 data points.”
Deep Underground Neutrino Experiment (DUNE), Far Detector Technical Design Report, Volume II: DUNE Physics (2020, methodology): “The complete data set used, as well as the parameters to which they are sensitive, are (1) from solar neutrino data [298, 413, 414, 415, 416, 417, 418, 419, 420, 421]: θ12, ∆m(2)21, and θ13; (2) from neutrino mode in long-baseline experiments K2K [422], MINOS [423, 424], T2K [425, 426], and NOνA [42”
Determination of matter potential from global analysis of neutrino oscillation data (2013, methodology): “For real-time experiments we include the 44 data points of Super-Kamiokande phase I (SK1) energy-zenith spectrum [61], the 33 data points of SK2 [62] and 42 data points of SK3 [63] energy and day/night spectra, and the 24 data points of the 1097-day energy spectrum and day-night asymmetry of SK4 [64”
Solar Neutrinos: Status and Prospects (2012, methodology): “Super-Kamiokande III (Super-Kamiokande Collaboration, K. Abe et al. 2011) collected nearly two years of data between October 2006 and August 2008, operating with a fully restored set of 11129 PMTs equipped with blast shields, providing 40% phototube coverage.”