Indication of Reactor (ν)over-bare Disappearance in the Double Chooz Experiment

被引：1012

作者：

Abe, Y. ^{[1
]}

Aberle, C. ^{[22
]}

Akiri, T. ^{[5
,16
]}

dos Anjos, J. C. ^{[6
]}

Ardellier, F. ^{[16
]}

Barbosa, A. F. ^{[6
]}

Baxter, A. ^{[27
]}

Bergevin, M. ^{[10
]}

Bernstein, A. ^{[17
]}

Bezerra, T. J. C. ^{[30
]}

Bezrukhov, L. ^{[15
]}

Blucher, E. ^{[7
]}

Bongrand, M. ^{[16
,30
]}

Bowden, N. S. ^{[17
]}

Buck, C. ^{[22
]}

Busenitz, J. ^{[3
]}

Cabrera, A. ^{[5
]}

Caden, E. ^{[11
]}

Camilleri, L. ^{[9
]}

Carr, R. ^{[9
]}

Cerrada, M. ^{[8
]}

Chang, P. -J. ^{[18
]}

Chimenti, P. ^{[34
]}

Classen, T. ^{[10
,17
]}

Collin, A. P. ^{[16
]}

Conover, E. ^{[7
]}

Conrad, J. M. ^{[21
]}

Cormon, S. ^{[26
]}

Crespo-Anadon, J. I. ^{[8
]}

Cribier, M. ^{[5
,16
]}

Crum, K. ^{[7
]}

Cucoanes, A. ^{[16
,26
]}

D'Agostino, M. V. ^{[4
]}

Damon, E. ^{[11
]}

Dawson, J. V. ^{[5
,36
]}

Dazeley, S. ^{[17
]}

Dierckxsens, M. ^{[7
]}

Dietrich, D. ^{[33
]}

Djurcic, Z. ^{[4
]}

Dracos, M. ^{[25
]}

Durand, V. ^{[5
,16
]}

Efremenko, Y. ^{[28
]}

Elnimr, M. ^{[26
]}

Endo, Y. ^{[29
]}

Etenko, A. ^{[20
]}

Falk, E. ^{[27
]}

Fallot, M. ^{[26
]}

Fechner, M. ^{[16
]}

von Feilitzsch, F. ^{[31
]}

Felde, J. ^{[10
]}

机构：

[1] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan

[2] Rhein Westfal TH Aachen, Inst Phys 3, D-52056 Aachen, Germany

[3] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA

[4] Argonne Natl Lab, Argonne, IL 60439 USA

[5] Univ Paris Diderot, Observ Paris, CNRS, CEA,APC,IRFU,IN2P3, F-75205 Paris 13, France

[6] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, RJ, Brazil

[7] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[8] CIEMAT, Ctr Invest Energet Medioambientales & Tecnol, E-28040 Madrid, Spain

[9] Columbia Univ, New York, NY 10027 USA

[10] Univ Calif Davis, Davis, CA 95616 USA

[11] Drexel Univ, Dept Phys, Philadelphia, PA 19104 USA

[12] Univ Hamburg, Inst Expt Phys, D-22761 Hamburg, Germany

[13] Hiroshima Inst Technol, Hiroshima 7315193, Japan

[14] IIT, Dept Phys, Chicago, IL 60616 USA

[15] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

[16] IRFU, Commissariat Energie Atom & Energies Alternat, Ctr Saclay, F-91191 Gif Sur Yvette, France

[17] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[18] Kansas State Univ, Dept Phys, Manhattan, KS 66506 USA

[19] Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan

[20] NRC Kurchatov Inst, Moscow 123182, Russia

[21] MIT, Cambridge, MA 02139 USA

[22] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany

[23] Niigata Univ, Dept Phys, Niigata 9502181, Japan

[24] Univ Notre Dame, Notre Dame, IN 46556 USA

[25] Univ Strasbourg, IPHC, CNRS, IN2P3, F-67037 Strasbourg, France

[26] Univ Nantes, SUBATECH, CNRS, Ecole Mines Nantes,IN2P3, F-44307 Nantes, France

[27] Univ Sussex, Dept Phys & Astron, Brighton BN1 9QH, E Sussex, England

[28] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[29] Tokyo Metropolitan Univ, Dept Phys, Tokyo 1920397, Japan

[30] Tohoku Univ, Res Ctr Neutrino Sci, Sendai, Miyagi 9808578, Japan

[31] Tech Univ Munich, Dept Phys, D-85747 Garching, Germany

[32] Tohoku Gakuin Univ, Sendai, Miyagi 9813193, Japan

[33] Univ Tubingen, Kepler Ctr Astro & Particle Phys, D-72076 Tubingen, Germany

[34] Univ Fed ABC, UFABC, Sao Paulo, Santo Andre, Brazil

[35] Univ Estadual Campinas UNICAMP, Campinas, SP, Brazil

[36] Lab Neutrino Champagne Ardenne, F-08600 Rancennes, France

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 13期

基金：

美国国家科学基金会; 巴西圣保罗研究基金会; 俄罗斯基础研究基金会;

关键词：

D O I：

10.1103/PhysRevLett.108.131801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Double Chooz experiment presents an indication of reactor electron antineutrino disappearance consistent with neutrino oscillations. An observed-to-predicted ratio of events of 0.944 +/- 0.016(stat) +/- 0.040(syst) was obtained in 101 days of running at the Chooz nuclear power plant in France, with two 4.25 GW(th) reactors. The results were obtained from a single 10 m(3) fiducial volume detector located 1050 m from the two reactor cores. The reactor antineutrino flux prediction used the Bugey4 flux measurement after correction for differences in core composition. The deficit can be interpreted as an indication of a nonzero value of the still unmeasured neutrino mixing parameter sin(2)2 theta(13). Analyzing both the rate of the prompt positrons and their energy spectrum, we find sin(2)2 theta(13) 0.086 +/- 0.041(stat) +/- 0.030(syst), or, at 90% C.L., 0.017 < sin(2)2 theta(13) < 0.16.

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