High sensitivity search for nu;e's from the sun and other sources at KamLAND

K Eguchi; S Enomoto; K Furuno; H Ikeda; K Ikeda; K Inoue; K Ishihara; T Iwamoto; T Kawashima; Y Kishimoto; M Koga; Y Koseki; T Maeda; T Mitsui; M Motoki; K Nakajima; H Ogawa; K Owada; F Piquemal; I Shimizu; J Shirai; F Suekane; A Suzuki; K Tada; O Tajima; T Takayama; K Tamae; H Watanabe; J Busenitz; Z Djurcic; K McKinny; D-M Mei; A Piepke; E Yakushev; B E Berger; Y D Chan; M P Decowski; D A Dwyer; S J Freedman; Y Fu; B K Fujikawa; J Goldman; K M Heeger; K T Lesko; K-B Luk; H Murayama; D R Nygren; C E Okada; A W P Poon; H M Steiner; L A Winslow; G A Horton-Smith; C Mauger; R D McKeown; B Tipton; P Vogel; C E Lane; T Miletic; P W Gorham; G Guillian; J G Learned; J Maricic; S Matsuno; S Pakvasa; S Dazeley; S Hatakeyama; R Svoboda; B D Dieterle; M DiMauro; J Detwiler; G Gratta; K Ishii; N Tolich; Y Uchida; M Batygov; W Bugg; Y Efremenko; Y Kamyshkov; A Kozlov; Y Nakamura; C R Gould; H J Karwowski; D M Markoff; J A Messimore; K Nakamura; R M Rohm; W Tornow; A R Young; M-J Chen; Y-F Wang; KamLAND Collaboration

doi:10.1103/PhysRevLett.92.071301

High sensitivity search for nu;e's from the sun and other sources at KamLAND

Phys Rev Lett. 2004 Feb 20;92(7):071301. doi: 10.1103/PhysRevLett.92.071301. Epub 2004 Feb 20.

Authors

K Eguchi¹, S Enomoto, K Furuno, H Ikeda, K Ikeda, K Inoue, K Ishihara, T Iwamoto, T Kawashima, Y Kishimoto, M Koga, Y Koseki, T Maeda, T Mitsui, M Motoki, K Nakajima, H Ogawa, K Owada, F Piquemal, I Shimizu, J Shirai, F Suekane, A Suzuki, K Tada, O Tajima, T Takayama, K Tamae, H Watanabe, J Busenitz, Z Djurcic, K McKinny, D-M Mei, A Piepke, E Yakushev, B E Berger, Y D Chan, M P Decowski, D A Dwyer, S J Freedman, Y Fu, B K Fujikawa, J Goldman, K M Heeger, K T Lesko, K-B Luk, H Murayama, D R Nygren, C E Okada, A W P Poon, H M Steiner, L A Winslow, G A Horton-Smith, C Mauger, R D McKeown, B Tipton, P Vogel, C E Lane, T Miletic, P W Gorham, G Guillian, J G Learned, J Maricic, S Matsuno, S Pakvasa, S Dazeley, S Hatakeyama, R Svoboda, B D Dieterle, M DiMauro, J Detwiler, G Gratta, K Ishii, N Tolich, Y Uchida, M Batygov, W Bugg, Y Efremenko, Y Kamyshkov, A Kozlov, Y Nakamura, C R Gould, H J Karwowski, D M Markoff, J A Messimore, K Nakamura, R M Rohm, W Tornow, A R Young, M-J Chen, Y-F Wang; KamLAND Collaboration

Affiliation

¹ Research Center for Neutrino Science, Tohoku University, Sendai 980-8578, Japan.

PMID: 14995837
DOI: 10.1103/PhysRevLett.92.071301

Abstract

Data corresponding to a KamLAND detector exposure of 0.28 kton yr has been used to search for nu;(e)'s in the energy range 8.3<E(nu;(e))<14.8 MeV. No candidates were found for an expected background of 1.1+/-0.4 events. This result can be used to obtain a limit on nu;(e) fluxes of any origin. Assuming that all nu;(e) flux has its origin in the Sun and has the characteristic 8B solar nu(e) energy spectrum, we obtain an upper limit of 3.7 x 10(2) cm(-2) s(-1) (90% C.L.) on the nu;(e) flux. We interpret this limit, corresponding to 2.8 x 10(-4) of the standard solar model 8B nu(e) flux, in the framework of spin-flavor precession and neutrino decay models.