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

    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, B E / Chan, Y D / Decowski, M P / Dwyer, D A / Freedman, S J / Fu, Y / Fujikawa, B K / Goldman, J / Gray, F / Heeger, K M / Lesko, K T / Luk, K-B / Murayama, H / Poon, A W P / Steiner, H M / Winslow, L A / Horton-Smith, G A / Mauger, C / McKeown, R D / Vogel, P / Lane, C E / Miletic, T / Gorham, P W / Guillian, G / Learned, J G / Maricic, J / Matsuno, S / Pakvasa, S / Dazeley, S / Hatakeyama, S / Rojas, A / Svoboda, R / Dieterle, B D / Detwiler, J / Gratta, G / Ishii, K / Tolich, N / Uchida, Y / Batygov, M / Bugg, W / Efremenko, Y / Kamyshkov, Y / Kozlov, A / Nakamura, Y / Gould, C R / Karwowski, H J / Markoff, D M / Messimore, J A / Nakamura, K / Rohm, R M / Tornow, W / Wendell, R / Young, A R / Chen, M-J / Wang, Y-F / Piquemal, F

    Physical review letters

    2005  Volume 94, Issue 8, Page(s) 81801

    Abstract: 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 ... ...

    Abstract 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.
    Language English
    Publishing date 2005-03-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.94.081801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: High sensitivity search for nu;e's from the sun and other sources at KamLAND.

    Eguchi, K / Enomoto, S / Furuno, K / Ikeda, H / Ikeda, K / 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 / Piquemal, F /
    Shimizu, I / Shirai, J / Suekane, F / Suzuki, A / Tada, K / Tajima, O / Takayama, T / Tamae, K / Watanabe, H / Busenitz, J / Djurcic, Z / McKinny, K / Mei, D-M / Piepke, A / Yakushev, E / Berger, B E / Chan, Y D / Decowski, M P / Dwyer, D A / Freedman, S J / Fu, Y / Fujikawa, B K / Goldman, J / Heeger, K M / Lesko, K T / Luk, K-B / Murayama, H / Nygren, D R / Okada, C E / Poon, A W P / Steiner, H M / Winslow, L A / Horton-Smith, G A / Mauger, C / McKeown, R D / Tipton, B / Vogel, P / Lane, C E / Miletic, T / Gorham, P W / Guillian, G / Learned, J G / Maricic, J / Matsuno, S / Pakvasa, S / Dazeley, S / Hatakeyama, S / Svoboda, R / Dieterle, B D / DiMauro, M / Detwiler, J / Gratta, G / Ishii, K / Tolich, N / Uchida, Y / Batygov, M / Bugg, W / Efremenko, Y / Kamyshkov, Y / Kozlov, A / Nakamura, Y / Gould, C R / Karwowski, H J / Markoff, D M / Messimore, J A / Nakamura, K / Rohm, R M / Tornow, W / Young, A R / Chen, M-J / Wang, Y-F

    Physical review letters

    2004  Volume 92, Issue 7, Page(s) 71301

    Abstract: Data corresponding to a KamLAND detector exposure of 0.28 kton yr has been used to search for nu;(e)'s in the energy range 8.3

    Abstract Data corresponding to a KamLAND detector exposure of 0.28 kton yr has been used to search for nu;(e)'s in the energy range 8.3<E(nu;(e))<14.8 MeV. No candidates were found for an expected background of 1.1+/-0.4 events. This result can be used to obtain a limit on nu;(e) fluxes of any origin. Assuming that all nu;(e) flux has its origin in the Sun and has the characteristic 8B solar nu(e) energy spectrum, we obtain an upper limit of 3.7 x 10(2) cm(-2) s(-1) (90% C.L.) on the nu;(e) flux. We interpret this limit, corresponding to 2.8 x 10(-4) of the standard solar model 8B nu(e) flux, in the framework of spin-flavor precession and neutrino decay models.<br />
    Language English
    Publishing date 2004-02-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.92.071301
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: First results from KamLAND: evidence for reactor antineutrino disappearance.

    Eguchi, K / Enomoto, S / Furuno, K / Goldman, J / Hanada, H / Ikeda, H / Ikeda, K / Inoue, K / Ishihara, K / Itoh, W / Iwamoto, T / Kawaguchi, T / Kawashima, T / Kinoshita, H / Kishimoto, Y / Koga, M / Koseki, Y / Maeda, T / Mitsui, T /
    Motoki, M / Nakajima, K / Nakajima, M / Nakajima, T / Ogawa, H / Owada, K / Sakabe, T / Shimizu, I / Shirai, J / Suekane, F / Suzuki, A / Tada, K / Tajima, O / Takayama, T / Tamae, K / Watanabe, H / Busenitz, J / Djurcic, Z / McKinny, K / Mei, D-M / Piepke, A / Yakushev, E / Berger, B E / Chan, Y D / Decowski, M P / Dwyer, D A / Freedman, S J / Fu, Y / Fujikawa, B K / Heeger, K M / Lesko, K T / Luk, K-B / Murayama, H / Nygren, D R / Okada, C E / Poon, A W P / Steiner, H M / Winslow, L A / Horton-Smith, G A / McKeown, R D / Ritter, J / Tipton, B / Vogel, P / Lane, C E / Miletic, T / Gorham, P W / Guillian, G / Learned, J G / Maricic, J / Matsuno, S / Pakvasa, S / Dazeley, S / Hatakeyama, S / Murakami, M / Svoboda, R C / Dieterle, B D / DiMauro, M / Detwiler, J / Gratta, G / Ishii, K / Tolich, N / Uchida, Y / Batygov, M / Bugg, W / Cohn, H / Efremenko, Y / Kamyshkov, Y / Kozlov, A / Nakamura, Y / De Braeckeleer, L / Gould, C R / Karwowski, H J / Markoff, D M / Messimore, J A / Nakamura, K / Rohm, R M / Tornow, W / Young, A R / Wang, Y-F

    Physical review letters

    2003  Volume 90, Issue 2, Page(s) 21802

    Abstract: KamLAND has measured the flux of nu;(e)'s from distant nuclear reactors. We find fewer nu;(e) events than expected from standard assumptions about nu;(e) propagation at the 99.95% C.L. In a 162 ton.yr exposure the ratio of the observed inverse beta-decay ...

    Abstract KamLAND has measured the flux of nu;(e)'s from distant nuclear reactors. We find fewer nu;(e) events than expected from standard assumptions about nu;(e) propagation at the 99.95% C.L. In a 162 ton.yr exposure the ratio of the observed inverse beta-decay events to the expected number without nu;(e) disappearance is 0.611+/-0.085(stat)+/-0.041(syst) for nu;(e) energies >3.4 MeV. In the context of two-flavor neutrino oscillations with CPT invariance, all solutions to the solar neutrino problem except for the "large mixing angle" region are excluded.
    Language English
    Publishing date 2003-01-17
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.90.021802
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 4' 58/153: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

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