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Measurement of neutrino oscillation with KamLAND: Evidence of spectral distortion
Araki, T; Eguchi, K; Enomoto, S; Furuno, K; Ichimura, K; Ikeda, H; Inoue, K; Ishihara, K; Iwamoto, T; Kawashima, T; Kishimoto, Y; Koga, M; Koseki, Y; Maeda, T; Mitsui, T; Motoki, M; Nakajima, K; Ogawa, H; Owada, K; Ricol, JS; Shimizu, I; Shirai, J; Suekane, F; Suzuki, A; Tada, K; Tajima, O; Tamae, K; Tsuda, Y; Watanabe, H; Busenitz, J; Classen, T; Djurcic, Z; Keefer, G; McKinny, K; Mei, DM; Piepke, A; Yakushev, E; Berger, BE; Chan, YD; Decowski, MP; Dwyer, DA; Freedman, SJ; Fu, Y; Fujikawa, BK; Goldman, J; Gray, F; Heeger, KM; Lesko, KT; Luk, KB; Murayama, H; Poon, AWP; Steiner, HM; Winslow, LA; Horton-Smith, GA; Mauger, C; McKeown, RD; Vogel, P; Lane, CE; Miletic, T; Gorham, PW; Guillian, G; Learned, JG; Maricic, J; Matsuno, S; Pakvasa, S; Dazeley, S; Hatakeyama, S; Rojas, A; Svoboda, R; Dieterle, BD; Detwiler, J; Gratta, G; Ishii, K; Tolich, N; Uchida, Y; Batygov, M; Bugg, W; Efremenko, Y; Kamyshkov, Y; Kozlov, A; Nakamura, Y; Gould, CR; Karwowski, HJ; Markoff, DM; Messimore, JA; Nakamura, K; Rohm, RM; Tornow, W; Wendell, R; Young, AR; Chen, MJ; Wang, YF; Piquemal, F
2005
发表期刊PHYSICAL REVIEW LETTERS
卷号94期号:8页码:81801
通讯作者Tohoku Univ, Res Ctr Neutrino Sci, Sendai, Miyagi 9808578, Japan ; Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA ; Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA ; Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA ; CALTECH, WK Kellogg Radiat Lab, Pasadena, CA 91125 USA ; Drexel Univ, Dept Phys, Philadelphia, PA 19104 USA ; Univ Hawaii Manoa, Dept Phys & Astron, Honolulu, HI 96822 USA ; Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA ; Univ New Mexico, Dept Phys, Albuquerque, NM 87131 USA ; Stanford Univ, Dept Phys, Stanford, CA 94305 USA ; Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA ; Triangle Univ Nucl Lab, Durham, NC 27708 USA ; Duke Univ, Dept Phys, Durham, NC 27706 USA ; Univ N Carolina, Dept Phys, Chapel Hill, NC USA ; Inst High Energy Phys, Beijing 100039, Peoples R China ; Univ Bordeaux 1, F-33175 Gradignan, France ; CEN Bordeaux Gradignan, IN2P3, CNRS, F-33175 Gradignan, France
文章类型Article
摘要We present results of a study of neutrino oscillation based on a 766 ton/year exposure of KamLAND to reactor antineutrinos. We observe 258 (ν) over bar (e) candidate events with energies above 3.4 MeV compared to 365.2+/-23.7 events expected in the absence of neutrino oscillation. Accounting for 17.8+/-7.3 expected background events, the statistical significance for reactor (ν) over bar (e) disappearance is 99.998%. The observed energy spectrum disagrees with the expected spectral shape in the absence of neutrino oscillation at 99.6% significance and prefers the distortion expected from (ν) over bar (e) oscillation effects. A two-neutrino oscillation analysis of the KamLAND data gives Deltam(2)=7.9(-0.5)(+0.6)x10(-5) eV(2). A global analysis of data from KamLAND and solar-neutrino experiments yields Deltam(2)=7.9(-0.5)(+0.6)x10(-5) eV(2) and tan(2)theta=0.40(-0.07)(+0.10), the most precise determination to date.
学科领域Physics
研究领域[WOS]Physics ; Physics
DOI10.1103/PhysRevLett.94.081801
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语种英语
研究领域[WOS]Physics ; Physics
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000227386000009
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被引频次:775[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240813
专题实验物理中心
作者单位中国科学院高能物理研究所
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Araki, T,Eguchi, K,Enomoto, S,et al. Measurement of neutrino oscillation with KamLAND: Evidence of spectral distortion[J]. PHYSICAL REVIEW LETTERS,2005,94(8):81801.
APA Araki, T.,Eguchi, K.,Enomoto, S.,Furuno, K.,Ichimura, K.,...&Piquemal, F.(2005).Measurement of neutrino oscillation with KamLAND: Evidence of spectral distortion.PHYSICAL REVIEW LETTERS,94(8),81801.
MLA Araki, T,et al."Measurement of neutrino oscillation with KamLAND: Evidence of spectral distortion".PHYSICAL REVIEW LETTERS 94.8(2005):81801.
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