Constraints on theta(13) from a three-flavor oscillation analysis of reactor antineutrinos at KamLAND

A. Gando; Y. Gando; K. Ichimura; H. Ikeda; K. Inoue; Y. Kibe; Y. Kishimoto; M. Koga; Y. Minekawa; T. Mitsui; T. Morikawa; N. Nagai; K. Nakajima; K. Nakamura; K. Narita; I. Shimizu; Y. Shimizu; J. Shirai; F. Suekane; A. Suzuki; H. Takahashi; N. Takahashi; Y. Takemoto; K. Tamae; H. Watanabe; B. D. Xu; H. Yabumoto; H. Yoshida; S. Yoshida; S. Enomoto; A. Kozlov; H. Murayama; C. Grant; G. Keefer; A. Piepke; T. I. Banks; T. Bloxham; J. A. Detwiler; S. J. Freedman; B. K. Fujikawa; K. Han; R. Kadel; T. O'Donnell; H. M. Steiner; D. A. Dwyer; R. D. McKeown; C. Zhang; B. E. Berger; C. E. Lane; J. Maricic; T. Miletic; M. Batygov; J. G. Learned; S. Matsuno; M. Sakai; G. A. Horton-Smith; K. E. Downum; G. Gratta; Y. Efremenko; O. Perevozchikov; H. J. Karwowski; D. M. Markoff; W. Tornow; K. M. Heeger; M. P. Decowski

doi:10.1103/PhysRevD.83.052002

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Constraints on theta(13) from a three-flavor oscillation analysis of reactor antineutrinos at KamLAND

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Constraints on theta(13) from a three-flavor oscillation analysis of reactor antineutrinos at KamLAND

A. Gando, Y. Gando, K. Ichimura, H. Ikeda, K. Inoue, Y. Kibe, Y. Kishimoto, M. Koga, Y. Minekawa, T. Mitsui, …

Physical review. D, Particles, fields, gravitation, and cosmology, v 83(5)

04 Mar 2011

DOI: https://doi.org/10.1103/PhysRevD.83.052002

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Abstract

Astronomy & Astrophysics

Physical Sciences

Physics

Physics, Particles & Fields

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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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Title: Constraints on theta(13) from a three-flavor oscillation analysis of reactor antineutrinos at KamLAND
Creators: A. Gando - Tohoku University
Y. Gando - Tohoku University
K. Ichimura - Tohoku University
H. Ikeda - Tohoku University
K. Inoue - University of Tokyo
Y. Kibe - Tokyo Institute of Technology
Y. Kishimoto - Tohoku University
M. Koga - University of Tokyo
Y. Minekawa - Tohoku University
T. Mitsui - Tohoku University
T. Morikawa - Tohoku University
N. Nagai - Tohoku University
K. Nakajima - Tohoku University
K. Nakamura - University of Tokyo
K. Narita - Tohoku University
I. Shimizu - Tohoku University
Y. Shimizu - Tohoku University
J. Shirai - Tohoku University
F. Suekane - Tohoku University
A. Suzuki - Tohoku University
H. Takahashi - Tohoku University
N. Takahashi - Tohoku University
Y. Takemoto - Tohoku University
K. Tamae - Tohoku University
H. Watanabe - Tohoku University
B. D. Xu - Tohoku University
H. Yabumoto - Tohoku University
H. Yoshida - Tohoku University
S. Yoshida - Tohoku University
S. Enomoto - University of Tokyo
A. Kozlov - University of Tokyo
H. Murayama - University of Tokyo
C. Grant - California Institute of Technology
G. Keefer - University of Alabama
A. Piepke - University of Alabama
T. I. Banks - University of California, Berkeley
T. Bloxham - University of California, Berkeley
J. A. Detwiler - University of California, Berkeley
S. J. Freedman - University of Tokyo
B. K. Fujikawa - University of Tokyo
K. Han - University of California, Berkeley
R. Kadel - University of California, Berkeley
T. O'Donnell - University of California, Berkeley
H. M. Steiner - University of California, Berkeley
D. A. Dwyer - California Institute of Technology
R. D. McKeown - California Institute of Technology
C. Zhang - California Institute of Technology
B. E. Berger - Colorado State University
C. E. Lane - Drexel University
J. Maricic - Drexel University
T. Miletic - Rowan University
M. Batygov - Univ Hawaii Manoa, Dept Phys & Astron, Honolulu, HI 96822 USA
J. G. Learned - Univ Hawaii Manoa, Dept Phys & Astron, Honolulu, HI 96822 USA
S. Matsuno - Univ Hawaii Manoa, Dept Phys & Astron, Honolulu, HI 96822 USA
M. Sakai - Univ Hawaii Manoa, Dept Phys & Astron, Honolulu, HI 96822 USA
G. A. Horton-Smith - University of Tokyo
K. E. Downum - Stanford University
G. Gratta - Stanford University
Y. Efremenko - University of Tokyo
O. Perevozchikov - University of Tennessee at Knoxville
H. J. Karwowski - University of North Carolina at Chapel Hill
D. M. Markoff - University of North Carolina at Chapel Hill
W. Tornow - University of North Carolina at Chapel Hill
K. M. Heeger - University of Tokyo
M. P. Decowski - University of Tokyo
Publication Details: Physical review. D, Particles, fields, gravitation, and cosmology, v 83(5)
Publisher: Amer Physical Soc
Number of pages: 11
Grant note: World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan; Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) 1002399 / Division Of Physics; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) DE-FG03-00ER41138; DE-AC02-05CH11231; DE-FG02-01ER41166 / U.S. Department of Energy (DOE); United States Department of Energy (DOE) DOE; United States Department of Energy (DOE) 16002002 / Japanese Ministry of Education, Culture, Sports, Science and Technology; Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT)
Resource Type: Journal article
Language: English
Academic Unit: Physics
Web of Science ID: WOS:000288005500002
Scopus ID: 2-s2.0-79960676048
Other Identifier: 991019297056504721

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Collaboration types: Domestic collaboration; International collaboration
Web of Science research areas: Astronomy & Astrophysics; Physics, Particles & Fields

Constraints on theta(13) from a three-flavor oscillation analysis of reactor antineutrinos at KamLAND

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