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Measurement of neutrino oscillation with KamLAND: Evidence of spectral distortion
文献类型：期刊论文
| 作者 | Araki, T; Eguchi, K; Enomoto, S; Furuno, K; Ichimura, K; Ikeda, H; Inoue, K; Ishihara, K; Iwamoto, T; Kawashima, T |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2005 |
| 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 |
| 英文摘要 | 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. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000227386000009 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/240813]  |
| 专题 | 高能物理研究所_实验物理中心 高能物理研究所_粒子天体物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | 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. |
入库方式： OAI收割
来源：高能物理研究所
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