Background-independent measurement of θ13 in Double Chooz

被引：43

作者：

Abe, Y. ^{[28
]}

dos Anjos, J. C. ^{[5
]}

Barriere, J. C. ^{[14
]}

Baussan, E. ^{[22
]}

Bekman, I. ^{[1
]}

Bergevin, M. ^{[9
]}

Bezerra, T. J. C. ^{[26
]}

Bezrukov, L. ^{[13
]}

Blucher, E. ^{[6
]}

Buck, C. ^{[19
]}

Busenitz, J. ^{[2
]}

Cabrera, A. ^{[4
]}

Caden, E. ^{[10
]}

Camilleri, L. ^{[8
]}

Carr, R. ^{[8
]}

Cerrada, M. ^{[7
]}

Chang, P. -J. ^{[15
]}

Chauveau, E. ^{[26
]}

Chimenti, P. ^{[31
]}

Collin, A. P. ^{[14
]}

Conover, E. ^{[6
]}

Conrad, J. M. ^{[6
]}

Crespo-Anadon, J. I. ^{[7
]}

Crum, K. ^{[6
]}

Cucoanes, A. ^{[23
]}

Damon, E. ^{[10
]}

Dawson, J. V. ^{[4
,34
]}

Dietrich, D. ^{[30
]}

Djurcic, Z. ^{[3
]}

Dracos, M. ^{[22
]}

Elnimr, M. ^{[2
]}

Etenko, A. ^{[17
]}

Fallot, M. ^{[23
]}

von Feilitzsch, F. ^{[24
]}

Felde, J. ^{[9
]}

Fernandes, S. M. ^{[2
]}

Fischer, V. ^{[14
]}

Franco, D. ^{[4
]}

Franke, M. ^{[24
]}

Furuta, H. ^{[26
]}

Gil-Botella, I. ^{[7
]}

Giot, L. ^{[23
]}

Goeger-Neff, M. ^{[24
]}

Gonzalez, L. F. G. ^{[32
]}

Goodenough, L. ^{[3
]}

Goodman, M. C. ^{[3
]}

Grant, C. ^{[9
]}

Haag, N. ^{[24
]}

Hara, T. ^{[16
]}

Haser, J. ^{[19
]}

机构：

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

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

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

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

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

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

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

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

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

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

[11] Hiroshima Inst Technol, Hiroshima 7315193, Japan

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

[13] Russian Acad Sci, Inst Nucl Res, Moscow 117901, Russia

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

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

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

[17] NRC Kurchatov Inst, Moscow 123182, Russia

[18] MIT, Cambridge, MA 02139 USA

[19] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

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

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

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

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

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

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

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

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

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

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

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

[31] Univ Fed ABC, UFABC, Santo Andre, SP, Brazil

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

[33] Virginia Tech, Ctr Neutrino Phys, Blacksburg, VA USA

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

来源：

PHYSICS LETTERS B | 2014年 / 735卷

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; 日本学术振兴会;

关键词：

D O I：

10.1016/j.physletb.2014.04.045

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The oscillation results published by the Double Chooz Collaboration in 2011 and 2012 rely on background models substantiated by reactor-on data. In this analysis, we present a background-model-independent measurement of the mixing angle theta(13) by including 7.53 days of reactor-off data. A global fit of the observed antineutrino rates for different reactor power conditions is performed, yielding a measurement of both theta(13) and the total background rate. The results on the mixing angle are improved significantly by including the reactor-off data in the fit, as it provides a direct measurement of the total background rate. This reactor rate modulation analysis considers antineutrino candidates with neutron captures on both Gd and H, whose combination yields sin(2)(2 theta(13)) = 0.102 +/- 0.028(stat.) +/- 0.033(syst.). The results presented in this study are fully consistent with the ones already published by Double Chooz, achieving a competitive precision. They provide, for the first time, a determination of theta(13) that does not depend on a background model. (C) 2014 The Authors. Published by Elsevier B.V.

引用

页码：51 / 56

页数：6

共 7 条

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