Improved measurement of B 8 solar neutrinos with 1.5 kt· y of Borexino exposure IMPROVED MEASUREMENT OF B 8 SOLAR NEUTRINOS ... AGOSTINI M. et al.

Borexino Collaboration

doi:10.1103/PhysRevD.101.062001

Improved measurement of B 8 solar neutrinos with 1.5 kt· y of Borexino exposure IMPROVED MEASUREMENT OF B 8 SOLAR NEUTRINOS ... AGOSTINI M. et al.

Borexino Collaboration

Technical University of Munich
National Research Centre "Kurchatov Institute"
Forschungszentrum Jülich (FZJ)
University of Milan
Department of Chemical Engineering
Universität Hamburg
Princeton University
Istituto Nazionale per la Fisica della Materia
Virginia Polytechnic Institute and State University
Moscow State University
Petersburg Nuclear Phys. Inst.
Laboratori Nazionali del Gran Sasso
Joint Inst. for Nuclear Research
Université Paris Diderot
University of Tübingen
Johannes Gutenberg University
Center for Nuclear Receptors and Cell Signaling, University of Houston
Jagiellonian University
Institute for Nuclear Research
RWTH Aachen University
National Research Nuclear University MEPhI
Gran Sasso Science Institute
Technische Universität Dresden
INFN Sezione di Perugia
University of Massachusetts Amherst

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

We report on an improved measurement of the B8 solar neutrino interaction rate with the Borexino experiment at the Laboratori Nazionali del Gran Sasso. Neutrinos are detected via their elastic scattering on electrons in a large volume of liquid scintillator. The measured rate of scattered electrons above 3 MeV of energy is 0.223-0.016+0.015(stat) -0.006+0.006(syst) cpd/100 t, which corresponds to an observed solar neutrino flux assuming no neutrino flavor conversion of φB8ES=2.57-0.18+0.17(stat) -0.07+0.07(syst)×106 cm-2 s-1. This measurement exploits the active volume of the detector in almost its entirety for the first time, and takes advantage of a reduced radioactive background following the 2011 scintillator purification campaign and of novel analysis tools providing a more precise modeling of the background. Additionally, we set a new limit on the interaction rate of solar hep neutrinos, searched via their elastic scattering on electrons as well as their neutral current-mediated inelastic scattering on carbon, C12(ν,ν′)C∗12 (Eγ=15.1 MeV).

Original language	English
Article number	062001
Journal	Physical Review D
Volume	101
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevD.101.062001
State	Published - 15 Mar 2020

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10.1103/PhysRevD.101.062001

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@article{45a79c513e874bd79e6d71be22d37f1f,

title = "Improved measurement of B 8 solar neutrinos with 1.5 kt· y of Borexino exposure IMPROVED MEASUREMENT OF B 8 SOLAR NEUTRINOS ... AGOSTINI M. et al.",

abstract = "We report on an improved measurement of the B8 solar neutrino interaction rate with the Borexino experiment at the Laboratori Nazionali del Gran Sasso. Neutrinos are detected via their elastic scattering on electrons in a large volume of liquid scintillator. The measured rate of scattered electrons above 3 MeV of energy is 0.223-0.016+0.015(stat) -0.006+0.006(syst) cpd/100 t, which corresponds to an observed solar neutrino flux assuming no neutrino flavor conversion of φB8ES=2.57-0.18+0.17(stat) -0.07+0.07(syst)×106 cm-2 s-1. This measurement exploits the active volume of the detector in almost its entirety for the first time, and takes advantage of a reduced radioactive background following the 2011 scintillator purification campaign and of novel analysis tools providing a more precise modeling of the background. Additionally, we set a new limit on the interaction rate of solar hep neutrinos, searched via their elastic scattering on electrons as well as their neutral current-mediated inelastic scattering on carbon, C12(ν,ν′)C∗12 (Eγ=15.1 MeV).",

author = "\{Borexino Collaboration\} and M. Agostini and K. Altenm{\"u}ller and S. Appel and V. Atroshchenko and Z. Bagdasarian and D. Basilico and G. Bellini and J. Benziger and D. Bick and D. Bravo and B. Caccianiga and F. Calaprice and A. Caminata and P. Cavalcante and A. Chepurnov and D. D'angelo and S. Davini and A. Derbin and \{Di Giacinto\}, A. and \{Di Marcello\}, V. and Ding, \{X. F.\} and \{Di Ludovico\}, A. and \{Di Noto\}, L. and I. Drachnev and A. Formozov and D. Franco and C. Galbiati and M. Gschwender and C. Ghiano and M. Giammarchi and A. Goretti and M. Gromov and D. Guffanti and C. Hagner and T. Houdy and E. Hungerford and Aldo Ianni and Andrea Ianni and A. Jany and D. Jeschke and V. Kobychev and G. Korga and S. Kumaran and T. Lachenmaier and M. Laubenstein and E. Litvinovich and P. Lombardi and I. Lomskaya and L. Oberauer and S. Sch{\"o}nert",

note = "Publisher Copyright: {\textcopyright} 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"} Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.",

year = "2020",

month = mar,

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doi = "10.1103/PhysRevD.101.062001",

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T1 - Improved measurement of B 8 solar neutrinos with 1.5 kt· y of Borexino exposure IMPROVED MEASUREMENT OF B 8 SOLAR NEUTRINOS ... AGOSTINI M. et al.

AU - Borexino Collaboration

AU - Agostini, M.

AU - Altenmüller, K.

AU - Appel, S.

AU - Atroshchenko, V.

AU - Bagdasarian, Z.

AU - Basilico, D.

AU - Bellini, G.

AU - Benziger, J.

AU - Bick, D.

AU - Bravo, D.

AU - Caccianiga, B.

AU - Calaprice, F.

AU - Caminata, A.

AU - Cavalcante, P.

AU - Chepurnov, A.

AU - D'angelo, D.

AU - Davini, S.

AU - Derbin, A.

AU - Di Giacinto, A.

AU - Di Marcello, V.

AU - Ding, X. F.

AU - Di Ludovico, A.

AU - Di Noto, L.

AU - Drachnev, I.

AU - Formozov, A.

AU - Franco, D.

AU - Galbiati, C.

AU - Gschwender, M.

AU - Ghiano, C.

AU - Giammarchi, M.

AU - Goretti, A.

AU - Gromov, M.

AU - Guffanti, D.

AU - Hagner, C.

AU - Houdy, T.

AU - Hungerford, E.

AU - Ianni, Aldo

AU - Ianni, Andrea

AU - Jany, A.

AU - Jeschke, D.

AU - Kobychev, V.

AU - Korga, G.

AU - Kumaran, S.

AU - Lachenmaier, T.

AU - Laubenstein, M.

AU - Litvinovich, E.

AU - Lombardi, P.

AU - Lomskaya, I.

AU - Oberauer, L.

AU - Schönert, S.

N1 - Publisher Copyright: © 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/" Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

PY - 2020/3/15

Y1 - 2020/3/15

N2 - We report on an improved measurement of the B8 solar neutrino interaction rate with the Borexino experiment at the Laboratori Nazionali del Gran Sasso. Neutrinos are detected via their elastic scattering on electrons in a large volume of liquid scintillator. The measured rate of scattered electrons above 3 MeV of energy is 0.223-0.016+0.015(stat) -0.006+0.006(syst) cpd/100 t, which corresponds to an observed solar neutrino flux assuming no neutrino flavor conversion of φB8ES=2.57-0.18+0.17(stat) -0.07+0.07(syst)×106 cm-2 s-1. This measurement exploits the active volume of the detector in almost its entirety for the first time, and takes advantage of a reduced radioactive background following the 2011 scintillator purification campaign and of novel analysis tools providing a more precise modeling of the background. Additionally, we set a new limit on the interaction rate of solar hep neutrinos, searched via their elastic scattering on electrons as well as their neutral current-mediated inelastic scattering on carbon, C12(ν,ν′)C∗12 (Eγ=15.1 MeV).

AB - We report on an improved measurement of the B8 solar neutrino interaction rate with the Borexino experiment at the Laboratori Nazionali del Gran Sasso. Neutrinos are detected via their elastic scattering on electrons in a large volume of liquid scintillator. The measured rate of scattered electrons above 3 MeV of energy is 0.223-0.016+0.015(stat) -0.006+0.006(syst) cpd/100 t, which corresponds to an observed solar neutrino flux assuming no neutrino flavor conversion of φB8ES=2.57-0.18+0.17(stat) -0.07+0.07(syst)×106 cm-2 s-1. This measurement exploits the active volume of the detector in almost its entirety for the first time, and takes advantage of a reduced radioactive background following the 2011 scintillator purification campaign and of novel analysis tools providing a more precise modeling of the background. Additionally, we set a new limit on the interaction rate of solar hep neutrinos, searched via their elastic scattering on electrons as well as their neutral current-mediated inelastic scattering on carbon, C12(ν,ν′)C∗12 (Eγ=15.1 MeV).

UR - https://www.scopus.com/pages/publications/85083516243

U2 - 10.1103/PhysRevD.101.062001

DO - 10.1103/PhysRevD.101.062001

M3 - Article

AN - SCOPUS:85083516243

SN - 2470-0010

VL - 101

JO - Physical Review D

JF - Physical Review D

IS - 6

M1 - 062001

ER -

Improved measurement of B 8 solar neutrinos with 1.5 kt· y of Borexino exposure IMPROVED MEASUREMENT OF B 8 SOLAR NEUTRINOS ... AGOSTINI M. et al.

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