Details

Autor(en) / Beteiligte

• Bronner, C.
• Hayato, Y.
• Ikeda, M.
• Kataoka, Y.
• Miura, M.
• Nakahata, M.
• Nakajima, Y.
• Nakayama, S.
• Okamoto, K.
• Orii, A.
• Sekiya, H.
• Sonoda, Y.
• Tanaka, H.
• Akutsu, R.
• Kajita, T.
• Okumura, K.
• Bravo-Berguño, D.
• Labarga, L.
• Marti, Ll
• Blaszczyk, F.d.M.
• Kearns, E.
• Stone, J.L.
• Wester, T.
• Pointon, B.W.
• Bian, J.
• Griskevich, N.J.
• Kropp, W.R.
• Locke, S.
• Mine, S.
• Smy, M.B.
• Sobel, H.W.
• Hill, J.
• Kim, J.Y.
• Scholberg, K.
• Bernard, L.
• Gonin, M.
• Mueller, Th.A.
• Jang, J.S.
• Anthony, L.H.V.
• Sztuc, A.A.
• Berardi, V.
• Collazuol, G.
• Lamoureux, M.
• Cao, S.
• Ishida, T.
• Jakkapu, M.
• Kobayashi, T.
• Matsubara, T.
• Nakamura, K.
• Sakashita, K.
• Tsukamoto, T.
• Shiozawa, T.
• Suzuki, A.T.
• Takeuchi, Y.
• Yamamoto, S.
• Ali, A.
• Feng, J.
• Ichikawa, A.K.
• Mori, M.
• Nakaya, T.
• Fernandez, P.
• Mehta, P.
• Tsui, K.M.
• Fukuda, Y.
• Menjo, H.
• Niwa, T.
• Sato, K.
• Mijakowski, P.
• Vilela, C.
• Wilking, M.J.
• Harada, M.
• Hagiwara, K.
• Horai, T.
• Ishino, H.
• Ito, S.
• Barrow, D.
• Goldsack, A.
• Nova, F.
• Boschi, T.
• Di Lodovico, F.
• Taani, M.
• Yang, J.Y.
• Jenkins, S.J.
• Malek, M.
• McElwee, J.M.
• Stone, O.
• Okazawa, H.
• Kim, S.B.
• Koshiba, M.
• Ogawa, N.
• Yokoyama, M.
• Inomoto, M.
• Matsumoto, R.
• Ohta, K.
• Towstego, T.
• Konaka, A.
• Chen, S.
• Jamieson, B.
• Walker, J.

Titel

Search for solar electron anti-neutrinos due to spin-flavor precession in the Sun with Super-Kamiokande-IV

Ist Teil von

• Astroparticle physics, 2022-06, Vol.139, p.102702, Article 102702

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Due to a very low production rate of electron anti-neutrinos (ν̄e) via nuclear fusion in the Sun, a flux of solar ν̄e is unexpected. An appearance of ν̄e in solar neutrino flux opens a new window for the new physics beyond the standard model. In particular, a spin-flavor precession process is expected to convert an electron neutrino into an electron anti-neutrino (νe→ν̄e) when neutrino has a finite magnetic moment. In this work, we have searched for solar ν̄e in the Super-Kamiokande experiment, using neutron tagging to identify their inverse beta decay signature. We identified 78 ν̄e candidates for neutrino energies of 9.3 to 17.3 MeV in 2970.1 live days with a fiducial volume of 22.5 kiloton water (183.0 kton⋅year exposure). The energy spectrum has been consistent with background predictions and we thus derived a 90% confidence level upper limit of 4.7×10−4 on the νe→ν̄e conversion probability in the Sun. We used this result to evaluate the sensitivity of future experiments, notably the Super-Kamiokande Gadolinium (SK-Gd) upgrade.