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Precision measurement of neutrino oscillation parameters with KamLAND.

Publication ,  Journal Article
Abe, S; Ebihara, T; Enomoto, S; Furuno, K; Gando, Y; Ichimura, K; Ikeda, H; Inoue, K; Kibe, Y; Kishimoto, Y; Koga, M; Kozlov, A; Minekawa, Y ...
Published in: Physical review letters
June 2008

The KamLAND experiment has determined a precise value for the neutrino oscillation parameter Deltam21(2) and stringent constraints on theta12. The exposure to nuclear reactor antineutrinos is increased almost fourfold over previous results to 2.44 x 10(32) proton yr due to longer livetime and an enlarged fiducial volume. An undistorted reactor nu[over]e energy spectrum is now rejected at >5sigma. Analysis of the reactor spectrum above the inverse beta decay energy threshold, and including geoneutrinos, gives a best fit at Deltam21(2)=7.58(-0.13)(+0.14)(stat) -0.15+0.15(syst) x 10(-5) eV2 and tan2theta12=0.56(-0.07)+0.10(stat) -0.06+0.10(syst). Local Deltachi2 minima at higher and lower Deltam21(2) are disfavored at >4sigma. Combining with solar neutrino data, we obtain Deltam21(2)=7.59(-0.21)+0.21 x 10(-5) eV2 and tan2theta12=0.47(-0.05)+0.06.

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Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

June 2008

Volume

100

Issue

22

Start / End Page

221803

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences
 

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Abe, S., Ebihara, T., Enomoto, S., Furuno, K., Gando, Y., Ichimura, K., … KamLAND Collaboration, . (2008). Precision measurement of neutrino oscillation parameters with KamLAND. Physical Review Letters, 100(22), 221803. https://doi.org/10.1103/physrevlett.100.221803
Abe, S., T. Ebihara, S. Enomoto, K. Furuno, Y. Gando, K. Ichimura, H. Ikeda, et al. “Precision measurement of neutrino oscillation parameters with KamLAND.Physical Review Letters 100, no. 22 (June 2008): 221803. https://doi.org/10.1103/physrevlett.100.221803.
Abe S, Ebihara T, Enomoto S, Furuno K, Gando Y, Ichimura K, et al. Precision measurement of neutrino oscillation parameters with KamLAND. Physical review letters. 2008 Jun;100(22):221803.
Abe, S., et al. “Precision measurement of neutrino oscillation parameters with KamLAND.Physical Review Letters, vol. 100, no. 22, June 2008, p. 221803. Epmc, doi:10.1103/physrevlett.100.221803.
Abe S, Ebihara T, Enomoto S, Furuno K, Gando Y, Ichimura K, Ikeda H, Inoue K, Kibe Y, Kishimoto Y, Koga M, Kozlov A, Minekawa Y, Mitsui T, Nakajima K, Nakamura K, Nakamura M, Owada K, Shimizu I, Shimizu Y, Shirai J, Suekane F, Suzuki A, Takemoto Y, Tamae K, Terashima A, Watanabe H, Yonezawa E, Yoshida S, Busenitz J, Classen T, Grant C, Keefer G, Leonard DS, McKee D, Piepke A, Decowski MP, Detwiler JA, Freedman SJ, Fujikawa BK, Gray F, Guardincerri E, Hsu L, Kadel R, Lendvai C, Luk K-B, Murayama H, O’Donnell T, Steiner HM, Winslow LA, Dwyer DA, Jillings C, Mauger C, McKeown RD, Vogel P, Zhang C, Berger BE, Lane CE, Maricic J, Miletic T, Batygov M, Learned JG, Matsuno S, Pakvasa S, Foster J, Horton-Smith GA, Tang A, Dazeley S, Downum KE, Gratta G, Tolich K, Bugg W, Efremenko Y, Kamyshkov Y, Perevozchikov O, Karwowski HJ, Markoff DM, Tornow W, Heeger KM, Piquemal F, Ricol J-S, KamLAND Collaboration. Precision measurement of neutrino oscillation parameters with KamLAND. Physical review letters. 2008 Jun;100(22):221803.

Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

June 2008

Volume

100

Issue

22

Start / End Page

221803

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences