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Measurement of neutrino oscillation with KamLAND: evidence of spectral distortion.

Publication ,  Journal Article
Araki, T; Eguchi, K; Enomoto, S; Furuno, K; Ichimura, K; Ikeda, H; Inoue, K; Ishihara, K; Iwamoto, T; Kawashima, T; Kishimoto, Y; Koga, M ...
Published in: Physical review letters
March 2005
Published version (DOI)

We present results of a study of neutrino oscillation based on a 766 ton/year exposure of KamLAND to reactor antineutrinos. We observe 258 nu (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 nu (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 nu (e) oscillation effects. A two-neutrino oscillation analysis of the KamLAND data gives Deltam(2)=7.9(+0.6)(-0.5)x10(-5) eV(2). A global analysis of data from KamLAND and solar-neutrino experiments yields Deltam(2)=7.9(+0.6)(-0.5)x10(-5) eV(2) and tan((2)theta=0.40(+0.10)(-0.07), the most precise determination to date.

Duke Scholars

Diane M Markoff
Author Diane M Markoff Physics
Werner Tornow
Author Werner Tornow Physics
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Published In

Physical review letters

DOI

10.1103/physrevlett.94.081801

EISSN

1079-7114

ISSN

0031-9007

Publication Date

March 2005

Volume

94

Issue

8

Start / End Page

081801

Related Subject Headings

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

Citation

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MLA
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Araki, T., Eguchi, K., Enomoto, S., Furuno, K., Ichimura, K., Ikeda, H., … KamLAND Collaboration. (2005). Measurement of neutrino oscillation with KamLAND: evidence of spectral distortion. Physical Review Letters, 94(8), 081801. https://doi.org/10.1103/physrevlett.94.081801
Araki, T., K. Eguchi, S. Enomoto, K. Furuno, K. Ichimura, H. Ikeda, K. Inoue, et al. “Measurement of neutrino oscillation with KamLAND: evidence of spectral distortion.” Physical Review Letters 94, no. 8 (March 2005): 081801. https://doi.org/10.1103/physrevlett.94.081801.
Araki T, Eguchi K, Enomoto S, Furuno K, Ichimura K, Ikeda H, et al. Measurement of neutrino oscillation with KamLAND: evidence of spectral distortion. Physical review letters. 2005 Mar;94(8):081801.
Araki, T., et al. “Measurement of neutrino oscillation with KamLAND: evidence of spectral distortion.” Physical Review Letters, vol. 94, no. 8, Mar. 2005, p. 081801. Epmc, doi:10.1103/physrevlett.94.081801.
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 J-S, 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 D-M, 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 K-B, 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 M-J, Wang Y-F, Piquemal F, KamLAND Collaboration. Measurement of neutrino oscillation with KamLAND: evidence of spectral distortion. Physical review letters. 2005 Mar;94(8):081801.

Published In

Physical review letters

DOI

10.1103/physrevlett.94.081801

EISSN

1079-7114

ISSN

0031-9007

Publication Date

March 2005

Volume

94

Issue

8

Start / End Page

081801

Related Subject Headings

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