期刊
PHYSICAL REVIEW D
卷 83, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.83.052002
关键词
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资金
- Japanese Ministry of Education, Culture, Sports, Science and Technology [16002002]
- World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan
- U.S. Department of Energy (DOE) [DE-FG03-00ER41138, DE-AC02-05CH11231, DE-FG02-01ER41166]
- DOE
- Direct For Education and Human Resources
- Division Of Human Resource Development [0833184] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [1002399] Funding Source: National Science Foundation
- U.S. Department of Energy (DOE) [DE-FG02-01ER41166] Funding Source: U.S. Department of Energy (DOE)
- Grants-in-Aid for Scientific Research [16002002, 21244025, 11J05080] Funding Source: KAKEN
We present new constraints on the neutrino oscillation parameters Delta m(21)(2), theta(12), and theta(13) from a three-flavor analysis of solar and KamLAND data. The KamLAND data set includes data acquired following a radiopurity upgrade and amounts to a total exposure of 3.49 x 10(32) target-proton-year. Under the assumption of CPT invariance, a two-flavor analysis (theta(13) = 0) of the KamLAND and solar data yields the best-fit values tan(2)theta(12) = 0.444(-0.030)(+0.036) and Delta m(21)(2) = 7.50(-0.20)(+0.19) x 10(-5) eV(2); a three-flavor analysis with theta(13) as a free parameter yields the best-fit values tan(2)theta(12) = 0.452(-0.033)(+0.035), Delta m(21)(2) = 7.50(-0.20)(+0.19) x 10(-5) eV(2), and sin(2)theta(13) = 0.020(-0.016)(+0.016). This theta(13) interval is consistent with other recent work combining the CHOOZ, atmospheric and long-baseline accelerator experiments. We also present a new global theta(13) analysis, incorporating the CHOOZ, atmospheric, and accelerator data, which indicates sin(2)theta(13) = 0.009(-0.007)(+0.013). A nonzero value is suggested, but only at the 79% C.L.
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