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Journal of High Energy Physics

, 2016:163 | Cite as

Measurement of θ 13 in Double Chooz using neutron captures on hydrogen with novel background rejection techniques

  • The Double Chooz collaboration
  • Y. Abe
  • S. Appel
  • T. Abrahão
  • H. Almazan
  • C. Alt
  • J.C. dos Anjos
  • J.C. Barriere
  • E. Baussan
  • I. Bekman
  • M. Bergevin
  • T.J.C. Bezerra
  • L. Bezrukov
  • E. Blucher
  • T. Brugière
  • C. Buck
  • J. Busenitz
  • A. Cabrera
  • L. Camilleri
  • R. Carr
  • M. Cerrada
  • E. Chauveau
  • P. Chimenti
  • A.P. Collin
  • J.M. Conrad
  • J.I. Crespo-Anadón
  • K. Crum
  • A.S. Cucoanes
  • E. Damon
  • J.V. Dawson
  • J. Dhooghe
  • D. Dietrich
  • Z. Djurcic
  • M. Dracos
  • A. Etenko
  • M. Fallot
  • F. von Feilitzsch
  • J. Felde
  • S.M. Fernandes
  • V. Fischer
  • D. Franco
  • M. Franke
  • H. Furuta
  • I. Gil-Botella
  • L. Giot
  • M. Göger-Neff
  • H. Gomez
  • L.F.G. Gonzalez
  • L. Goodenough
  • M.C. Goodman
  • N. Haag
  • T. Hara
  • J. Haser
  • D. Hellwig
  • M. Hofmann
  • G.A. Horton-Smith
  • A. Hourlier
  • M. IshitsukaEmail author
  • J. Jochum
  • C. Jollet
  • F. Kaether
  • L.N. Kalousis
  • Y. Kamyshkov
  • M. Kaneda
  • D.M. Kaplan
  • T. Kawasaki
  • E. Kemp
  • H. de Kerret
  • D. Kryn
  • M. Kuze
  • T. Lachenmaier
  • C.E. Lane
  • T. Lasserre
  • A. Letourneau
  • D. Lhuillier
  • H.P. LimaJr
  • M. Lindner
  • J.M. López-Castaño
  • J.M. LoSecco
  • B. Lubsandorzhiev
  • S. Lucht
  • J. Maeda
  • C. Mariani
  • J. Maricic
  • J. Martino
  • T. Matsubara
  • G. Mention
  • A. Meregaglia
  • T. Miletic
  • R. Milincic
  • A. Minotti
  • Y. Nagasaka
  • D. Navas-Nicolás
  • P. Novella
  • L. Oberauer
  • M. Obolensky
  • A. Onillon
  • A. Osborn
  • C. Palomares
  • I.M. Pepe
  • S. Perasso
  • A. Porta
  • G. Pronost
  • J. Reichenbacher
  • B. Reinhold
  • M. Röhling
  • R. Roncin
  • B. Rybolt
  • Y. Sakamoto
  • R. Santorelli
  • A.C. Schilithz
  • S. Schönert
  • S. Schoppmann
  • M.H. Shaevitz
  • R. Sharankova
  • D. Shrestha
  • V. Sibille
  • V. Sinev
  • M. Skorokhvatov
  • E. Smith
  • M. Soiron
  • J. Spitz
  • A. Stahl
  • I. Stancu
  • L.F.F. Stokes
  • M. Strait
  • F. Suekane
  • S. Sukhotin
  • T. Sumiyoshi
  • Y. Sun
  • R. Svoboda
  • K. Terao
  • A. Tonazzo
  • H.H. Trinh Thi
  • G. Valdiviesso
  • N. Vassilopoulos
  • C. Veyssiere
  • M. Vivier
  • S. Wagner
  • N. Walsh
  • H. Watanabe
  • C. Wiebusch
  • M. Wurm
  • G. Yang
  • F. Yermia
  • V. Zimmer
Open Access
Regular Article - Experimental Physics

Abstract

The Double Chooz collaboration presents a measurement of the neutrino mixing angle θ 13 using reactor \( \overline{\nu_{\mathrm{e}}} \) observed via the inverse beta decay reaction in which the neutron is captured on hydrogen. This measurement is based on 462.72 live days data, approximately twice as much data as in the previous such analysis, collected with a detector positioned at an average distance of 1050 m from two reactor cores. Several novel techniques have been developed to achieve significant reductions of the backgrounds and systematic uncertainties. Accidental coincidences, the dominant background in this analysis, are suppressed by more than an order of magnitude with respect to our previous publication by a multi-variate analysis. These improvements demonstrate the capability of precise measurement of reactor \( \overline{\nu_{\mathrm{e}}} \) without gadolinium loading. Spectral distortions from the \( \overline{\nu_{\mathrm{e}}} \) reactor flux predictions previously reported with the neutron capture on gadolinium events are confirmed in the independent data sample presented here. A value of sin2 2θ 13 = 0.095 − 0.039 + 0.038 (stat+syst) is obtained from a fit to the observed event rate as a function of the reactor power, a method insensitive to the energy spectrum shape. A simultaneous fit of the hydrogen capture events and of the gadolinium capture events yields a measurement of sin2 2θ 13 = 0.088 ± 0.033(stat+syst).

Keywords

Oscillation Electroweak interaction Neutrino Detectors and Telescopes Flavor physics 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2016

Authors and Affiliations

  • The Double Chooz collaboration
  • Y. Abe
    • 32
  • S. Appel
    • 34
  • T. Abrahão
    • 10
  • H. Almazan
    • 25
  • C. Alt
    • 6
  • J.C. dos Anjos
    • 10
  • J.C. Barriere
    • 19
  • E. Baussan
    • 27
  • I. Bekman
    • 6
  • M. Bergevin
    • 14
  • T.J.C. Bezerra
    • 30
  • L. Bezrukov
    • 18
  • E. Blucher
    • 11
  • T. Brugière
    • 27
  • C. Buck
    • 25
  • J. Busenitz
    • 7
  • A. Cabrera
    • 9
  • L. Camilleri
    • 13
  • R. Carr
    • 13
  • M. Cerrada
    • 12
  • E. Chauveau
    • 30
  • P. Chimenti
    • 36
  • A.P. Collin
    • 25
  • J.M. Conrad
    • 24
  • J.I. Crespo-Anadón
    • 12
  • K. Crum
    • 11
  • A.S. Cucoanes
    • 28
  • E. Damon
    • 15
  • J.V. Dawson
    • 9
  • J. Dhooghe
    • 14
  • D. Dietrich
    • 35
  • Z. Djurcic
    • 8
  • M. Dracos
    • 27
  • A. Etenko
    • 23
  • M. Fallot
    • 28
  • F. von Feilitzsch
    • 34
  • J. Felde
    • 14
    • 1
  • S.M. Fernandes
    • 7
  • V. Fischer
    • 19
  • D. Franco
    • 9
  • M. Franke
    • 34
  • H. Furuta
    • 30
  • I. Gil-Botella
    • 12
  • L. Giot
    • 28
  • M. Göger-Neff
    • 34
  • H. Gomez
    • 9
  • L.F.G. Gonzalez
    • 37
  • L. Goodenough
    • 8
  • M.C. Goodman
    • 8
  • N. Haag
    • 34
  • T. Hara
    • 22
  • J. Haser
    • 25
  • D. Hellwig
    • 6
  • M. Hofmann
    • 34
  • G.A. Horton-Smith
    • 20
  • A. Hourlier
    • 9
  • M. Ishitsuka
    • 32
    Email author
  • J. Jochum
    • 35
  • C. Jollet
    • 27
  • F. Kaether
    • 25
  • L.N. Kalousis
    • 38
  • Y. Kamyshkov
    • 29
  • M. Kaneda
    • 32
  • D.M. Kaplan
    • 17
  • T. Kawasaki
    • 21
  • E. Kemp
    • 37
  • H. de Kerret
    • 9
  • D. Kryn
    • 9
  • M. Kuze
    • 32
  • T. Lachenmaier
    • 35
  • C.E. Lane
    • 15
  • T. Lasserre
    • 19
    • 9
  • A. Letourneau
    • 19
  • D. Lhuillier
    • 19
  • H.P. LimaJr
    • 10
  • M. Lindner
    • 25
  • J.M. López-Castaño
    • 12
  • J.M. LoSecco
    • 26
  • B. Lubsandorzhiev
    • 18
  • S. Lucht
    • 6
  • J. Maeda
    • 33
    • 2
  • C. Mariani
    • 38
  • J. Maricic
    • 15
    • 3
  • J. Martino
    • 28
  • T. Matsubara
    • 33
  • G. Mention
    • 19
  • A. Meregaglia
    • 27
  • T. Miletic
    • 15
  • R. Milincic
    • 15
    • 3
  • A. Minotti
    • 27
  • Y. Nagasaka
    • 16
  • D. Navas-Nicolás
    • 12
  • P. Novella
    • 12
    • 4
  • L. Oberauer
    • 34
  • M. Obolensky
    • 9
  • A. Onillon
    • 9
  • A. Osborn
    • 29
  • C. Palomares
    • 12
  • I.M. Pepe
    • 10
  • S. Perasso
    • 9
  • A. Porta
    • 28
  • G. Pronost
    • 28
  • J. Reichenbacher
    • 7
  • B. Reinhold
    • 25
    • 3
  • M. Röhling
    • 35
  • R. Roncin
    • 9
  • B. Rybolt
    • 29
  • Y. Sakamoto
    • 31
  • R. Santorelli
    • 12
  • A.C. Schilithz
    • 10
  • S. Schönert
    • 34
  • S. Schoppmann
    • 6
  • M.H. Shaevitz
    • 13
  • R. Sharankova
    • 32
  • D. Shrestha
    • 20
  • V. Sibille
    • 19
  • V. Sinev
    • 18
  • M. Skorokhvatov
    • 23
  • E. Smith
    • 15
  • M. Soiron
    • 6
  • J. Spitz
    • 24
  • A. Stahl
    • 6
  • I. Stancu
    • 7
  • L.F.F. Stokes
    • 35
  • M. Strait
    • 11
  • F. Suekane
    • 30
  • S. Sukhotin
    • 23
  • T. Sumiyoshi
    • 33
  • Y. Sun
    • 7
    • 3
  • R. Svoboda
    • 14
  • K. Terao
    • 24
  • A. Tonazzo
    • 9
  • H.H. Trinh Thi
    • 34
  • G. Valdiviesso
    • 10
  • N. Vassilopoulos
    • 27
  • C. Veyssiere
    • 19
  • M. Vivier
    • 19
  • S. Wagner
    • 10
  • N. Walsh
    • 14
  • H. Watanabe
    • 25
  • C. Wiebusch
    • 6
  • M. Wurm
    • 35
    • 5
  • G. Yang
    • 8
    • 17
  • F. Yermia
    • 28
  • V. Zimmer
    • 34
  1. 1.Department of PhysicsUniversity of MarylandCollege ParkU.S.A.
  2. 2.Department of PhysicsKobe UniversityKobeJapan
  3. 3.Department of Physics & AstronomyUniversity of Hawaii at ManoaHonoluluU.S.A.
  4. 4.Instituto de Física Corpuscular, IFIC (CSIC/UV)PaternaSpain
  5. 5.Institut für Physik and Excellence Cluster PRISMA, Johannes Gutenberg-Universität MainzMainzGermany
  6. 6.III. Physikalisches Institut,RWTH Aachen UniversityAachenGermany
  7. 7.Department of Physics and AstronomyUniversity of Alabama,TuscaloosaU.S.A.
  8. 8.Argonne National LaboratoryArgonneU.S.A.
  9. 9.AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/IRFUParis Cedex 13France
  10. 10.Centro Brasileiro de Pesquisas Físicas,Rio de JaneiroBrazil
  11. 11.The Enrico Fermi InstituteThe University of ChicagoChicagoU.S.A.
  12. 12.Centro de Investigaciones Energéticas, Medioambientales y TecnológicasCIEMATMadridSpain
  13. 13.Columbia UniversityNew YorkU.S.A.
  14. 14.University of CaliforniaDavisU.S.A.
  15. 15.Department of PhysicsDrexel UniversityPhiladelphiaU.S.A.
  16. 16.Hiroshima Institute of TechnologyHiroshimaJapan
  17. 17.Department of PhysicsIllinois Institute of TechnologyChicagoU.S.A.
  18. 18.Institute of Nuclear Research of the Russian Academy of SciencesMoscowRussia
  19. 19.Commissariat à l’Energie Atomique et aux Energies Alternatives, Centre de Saclay, IRFUGif-sur-YvetteFrance
  20. 20.Department of PhysicsKansas State UniversityManhattanU.S.A.
  21. 21.Department of PhysicsKitasato UniversitySagamiharaJapan
  22. 22.Department of PhysicsKobe UniversityKobeJapan
  23. 23.NRC Kurchatov InstituteMoscowRussia
  24. 24.Massachusetts Institute of TechnologyCambridgeU.S.A.
  25. 25.Max-Planck-Institut für KernphysikHeidelbergGermany
  26. 26.University of Notre DameNotre DameU.S.A.
  27. 27.IPHC, Université de Strasbourg, CNRS/IN2P3StrasbourgFrance
  28. 28.SUBATECH, CNRS/IN2P3, Université de Nantes, Ecole des Mines de NantesNantesFrance
  29. 29.Department of Physics and AstronomyUniversity of TennesseeKnoxvilleU.S.A.
  30. 30.Research Center for Neutrino ScienceTohoku UniversitySendaiJapan
  31. 31.Tohoku Gakuin UniversitySendaiJapan
  32. 32.Department of PhysicsTokyo Institute of TechnologyTokyoJapan
  33. 33.Department of PhysicsTokyo Metropolitan UniversityTokyoJapan
  34. 34.Physik DepartmentTechnische Universität MünchenGarchingGermany
  35. 35.Kepler Center for Astro and Particle PhysicsUniversität TübingenTübingenGermany
  36. 36.Universidade Federal do ABC, UFABCSanto AndréBrazil
  37. 37.Universidade Estadual de Campinas-UNICAMPCampinasBrazil
  38. 38.Center for Neutrino Physics, Virginia TechBlacksburgU.S.A.

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