Solar neutrino measurements in Super-Kamiokande-IV

Abe, K.; Haga, Y.; Hayato, Y.; Ikeda, M.; Iyogi, K.; Kameda, J.; Kishimoto, Y.; Marti, Ll.; Miura, M.; Moriyama, S.; Nakahata, M.; Nakajima, Tetsuo; Nakayama, S.; Orii, A.; Sekiya, H.; Shiozawa, M.; Sonoda, Y.; Takeda, Atsushi; Takenaga, Y.; Tasaka, S.; Tomura, T.; Ueno, K.; Yokozawa, T.; Akutsu, R.; Irvine, T. J.; Kaji, Hiroshi; Kajita, T.; Kametani, I.; Kaneyuki, K.; Lee, K. P.; Nishimura, Y.; Mclachlan, T. C.; Okumura, K.; Richard, E.; Labarga, L.; Fernández, P.; Blaszczyk, F. d. M.; Gustafson, J.; Kachulis, C.; Kearns, E.; Raaf, J. L.; Stone, J. L.; Sulak, L.; Berkman, S.; Tobayama, S.; Goldhaber, M.; Bays, K.; Carminati, G.; Griskevich, N. J.; Kropp, W. R.; Mine, S.; Renshaw, A.; Smy, M. B.; Sobel, H. W.; Takhistov, Volodymyr; Weatherly, P.; Ganezer, K. S.; Hartfiel, B. L.; Hill, J.; Keig, W. E.; Hồng, Nguyễn Thị; Kim, J. Y.; Lim, I. T.; Park, R. G.; Akiri, T.; Albert, J.; Himmel, A.; Li, Z.; O’Sullivan, Erin; Scholberg, K.; Walter, C. W.; Wongjirad, T.; Ishizuka, T.; Nakamura, T.; Jang, J. S.; Choi, Koun; Learned, J. G.; Matsuno, S.; Smith, S. N.; Friend, M.; Hasegawa, T.; Ishida, Toru; Ishii, T.; Kobayashi, T.; Nakadaira, T.; Nakamura, K.; Nishikawa, K.; Oyama, Y.; Sakashita, K.; Sekiguchi, T.; Tsukamoto, T.; Nakano, Y.; Suzuki, A.; Takeuchi, Y.; Yano, T.; Cao, S.; Hayashino, T.; Hiraki, T.; Hirota, S.; Huang, K.; Ieki, K.; Jiang, M.; Kikawa, T.; Minamino, A.; Murakami, Akira; Nakaya, T.; Patel, N. D.; Suzuki, Kenta; Takahashi, Sentaro; Wendell, R.; Fukuda, Y.; Itow, Y.; Mitsuka, G.; Muto, Fumihito; Suzuki, Toshikazu; Mijakowski, P.; Frankiewicz, K.; Hignight, J.; Imber, J.; Jung, C. K.; Li, X.; Palomino, J. L.; Santucci, G.; Taylor, Ian; Vilela, C.; Wilking, M. J.; Yanagisawa, C.; Fukuda, Daisuke; Ishino, H.; Kayano, T.; Kibayashi, A.; Koshio, Y.; Mori, T.; Sakuda, M.; Takeuchi, J.; Yamaguchi, R.; Kuno, Y.; Tacik, R.; Kim, S. B.; Okazawa, H.; Choi, Y.; Ito, K.; Nishijima, K.; Koshiba, M.; Totsuka, Y.; Suda, Y.; Yokoyama, M.; Bronner, C.; Calland, R. G.; Hartz, M.; Martens, K.; Obayashi, Y.; Suzuki, Y.; Vagins, M. R.; Nantais, C.; Martin, J. F.; Perio, P. de; Tanaka, Hirohisa; Konaka, A.; Chen, S.; Sui, H.; Wan, L.; Yang, Zhen; Zhang, H.; Zhang, Yang; Connolly, K.; Dziomba, M.; Wilkes, R. J.

doi:10.1103/physrevd.94.052010

Cited by 296 publications

(285 citation statements)

References 96 publications

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“…Indeed, the measurements of 8 B neutrinos of Super-Kamiokande [5] and SNO [3] are consistent with a constant suppression of the expected flux. Super-Kamiokande Collaboration [5] finds a hint for day-night effect but does not see evidence of a decrease with the energy of the survival probability (in solar neutrino jargon, "upturn" means commonly a negative and measurable value of the slope at 8 B energies).…”

Section: Introductionsupporting

confidence: 60%

“…However, in a recent paper of SuperKamiokande Collaboration one reads that [5], there is still no clear evidence that the solar neutrino flavor conversion is indeed due to neutrino oscillations and not caused by another mechanism.…”

Section: Introductionmentioning

confidence: 99%

“…Super-Kamiokande Collaboration [5] finds a hint for day-night effect but does not see evidence of a decrease with the energy of the survival probability (in solar neutrino jargon, "upturn" means commonly a negative and measurable value of the slope at 8 B energies). SNO results [3] do not contradict these results even if they are less significant.…”

Section: Introductionmentioning

confidence: 99%

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Untitled

2017

Nucl. Phys. At. Energy

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Solar neutrino oscillations are supported by KamLAND's antineutrino measurements, but certain solar neutrino data -the observed shape of the 8 B flux and the difference between day and night counting rates measured in Super-K -do not fit well with the ensuing oscillation pattern. Interestingly, other solar neutrino data allow independent tests of the survival probability. Thanks to the new measurements of Borexino at low-energies along with the standard solar model and to the results of SNO at high-energies, four values of the neutrino survival probability are known. We build and study a likelihood based only on these solar neutrino data. The results agree well with the standard oscillation pattern and in particular with KamLAND findings. A related and straightforward procedure permits to reconstruct the survival probability of solar neutrinos and to assess its uncertainties, for all solar neutrino energies.

show abstract

Section: Introductionsupporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Untitled

2017

Nucl. Phys. At. Energy

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“…There are other charged-current and neutral-current interactions with 16 O nuclei that are subdominant. There are two data samples used by SK for low-energy analysis: one tuned for the supernova relic neutrino (SRN) search (Bays et al 2012) and another for the solar neutrino analysis (Abe et al 2016b). These are independent selection methods and apply to different energy ranges for the GW170817 event search.…”

Section: Low-energy Data Samplementioning

confidence: 99%

Search for Neutrinos in Super-Kamiokande Associated with the GW170817 Neutron-star Merger

Bronner¹,

Hayato²,

Ikeda³

et al. 2018

ApJL

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We report the results of a neutrino search in Super-Kamiokande (SK) for coincident signals with the first detected gravitational wave (GW) produced by a binary neutron-star merger, GW170817, which was followed by a short gamma-ray burst, GRB170817A, and a kilonova/macronova. We searched for coincident neutrino events in the range from 3.5MeV to ∼100 PeV, in a time window ±500 s around the gravitational wave detection time, as well as during a 14-day period after the detection. No significant neutrino signal was observed for either time window. We calculated 90% confidence level upper limits on the neutrino fluence for GW170817. From the upward-goingmuon events in the energy region above 1.6 GeV, the neutrino fluence limit is -+ 16.0 0.6 0.7 ( -+ 21.3 0.8 1.1 ) cm −2 for muon neutrinos (muon antineutrinos), with an error range of ±5°around the zenith angle of NGC4993, and the energy spectrum is under the assumption of an index of −2. The fluence limit for neutrino energies less than 100MeV, for which the emission mechanism would be different than for higher-energy neutrinos, is also calculated. It is 6.6×10 7 cm −2 for anti-electron neutrinos under the assumption of a Fermi-Dirac spectrum with average energy of 20 MeV.

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“…Neutrino oscillation parameters are mostly constrained by solar neutrino experiments [40][41][42][43][44][45], the SuperKamiokande atmospheric neutrino data [37], and accelerator data from MINOS [46], T2K [47], and the NuMI Off-Axis ν e Appearance Experiment (NOνA) [48]. These imply the existence of two hierarchical mass-squared differences ∆m 2 21 and ∆m 2 32 and three nonzero mixing angles θ 13 , θ 12 , θ 23 .…”

Section: Neutrino Parameter Measurementsmentioning

confidence: 99%

Neutrino versus antineutrino oscillation parameters at DUNE and Hyper-Kamiokande experiments

Gouvêa

Kelly

2017

Phys. Rev. D

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Testing, in a non-trivial, model-independent way, the hypothesis that the three-massive-neutrinos paradigm properly describes nature is among the main goals of the current and the next generation of neutrino oscillation experiments. In the coming decade, the DUNE and Hyper-Kamiokande experiments will be able to study the oscillation of both neutrinos and antineutrinos with unprecedented precision. We explore the ability of these experiments, and combinations of them, to determine whether the parameters that govern these oscillations are the same for neutrinos and antineutrinos, as prescribed by the CPT-theorem. We find that both DUNE and Hyper-Kamiokande will be sensitive to unexplored levels of leptonic CPT-violation. Assuming the parameters for neutrino and antineutrino oscillations are unrelated, we discuss the ability of these experiments to determine the neutrino and antineutrino mass-hierarchies, atmospheric-mixing octants, and CP-odd phases, three key milestones of the experimental neutrino physics program. Additionally, if the CPT-theorem is violated in nature in a way that is consistent with all present neutrino and antineutrino oscillation data, we find that DUNE and Hyper-Kamiokande have the potential to ultimately establish leptonic CPT-invariance violation.

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Solar neutrino measurements in Super-Kamiokande-IV

Cited by 296 publications

References 96 publications

Untitled

Untitled

Search for Neutrinos in Super-Kamiokande Associated with the GW170817 Neutron-star Merger

Neutrino versus antineutrino oscillation parameters at DUNE and Hyper-Kamiokande experiments

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