Journal Article

FZJ-2020-01794

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Improved measurement of B 8 solar neutrinos with 1.5 kt · y of Borexino exposure

Agostini, M. ; Altenmüller, K. ; Appel, S. ; Atroshchenko, V. ; Bagdasarian, Z.FZJ* ; Basilico, D. ; Bellini, G. ; Benziger, J. ; Bick, D. ; Bravo, D. ; Caccianiga, B. ; Calaprice, F. ; Caminata, A. ; Cavalcante, P. ; Chepurnov, A. ; D’Angelo, D. ; Davini, S. ; Derbin, A. ; Di Giacinto, A. ; Di Marcello, V. ; Ding, X. F. ; Di Ludovico, A. ; Di Noto, L. ; Drachnev, I. ; Formozov, A. ; Franco, D. ; Galbiati, C. ; Gschwender, M. ; Ghiano, C. ; Giammarchi, M. ; Goretti, A. ; Gromov, M. ; Guffanti, D. ; Hagner, C. ; Houdy, T. ; Hungerford, E. ; Ianni, A. ; Ianni, A. ; Jany, A. ; Jeschke, D. ; Kobychev, V. ; Korga, G. ; Kumaran, S.FZJ*RWTH* ; Lachenmaier, T. ; Laubenstein, M. ; Litvinovich, E. ; Lombardi, P. ; Lomskaya, I. ; Ludhova, L. (Corresponding author)FZJ*RWTH* ; Lukyanchenko, G. ; Lukyanchenko, L. ; Machulin, I. ; Marcocci, S. ; Martyn, J. ; Meroni, E. ; Meyer, M. ; Miramonti, L. ; Misiaszek, M. ; Muratova, V. ; Neumair, B. ; Nieslony, M. ; Nugmanov, R. ; Oberauer, L. ; Orekhov, V. ; Ortica, F. ; Pallavicini, M. ; Papp, L. ; Penek, Ö.FZJ*RWTH* ; Pietrofaccia, L. ; Pilipenko, N. ; Pocar, A. ; Raikov, G. ; Ranalli, M. T. ; Ranucci, G. (Corresponding author) ; Razeto, A. ; Re, A. ; Redchuk, M.FZJ*RWTH* ; Romani, A. ; Rossi, N. ; Rottenanger, S. ; Schönert, S. ; Semenov, D. ; Skorokhvatov, M. ; Smirnov, O. ; Sotnikov, A. ; Suvorov, Y. ; Tartaglia, R. ; Testera, G. ; Thurn, J. ; Unzhakov, E. ; Vishneva, A. ; Vogelaar, R. B. ; von Feilitzsch, F. ; Wojcik, M. ; Wurm, M. ; Zavatarelli, S. ; Zuber, K. ; Zuzel, G.

2020
Melville, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/24743  doi:10.1103/PhysRevD.101.062001

Abstract: We report on an improved measurement of the 8B 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+0.015−0.016(stat)+0.006−0.006(syst) cpd/100 t, which corresponds to an observed solar neutrino flux assuming no neutrino flavor conversion of Φ^{ES}_{8B}=2.57+0.17−0.18(stat)+0.07−0.07(syst)×10^6 cm−2s−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, 12C(ν,ν′) 12C* (Eγ= 15.1 MeV).

Keyword(s): Nuclei and Particles (1st) ; Basic research (1st) ; Particle Physics (2nd) ; Nuclear Physics (2nd)

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Contributing Institute(s):

1. Experimentelle Hadrondynamik (IKP-2)

Research Program(s):

1. 612 - Cosmic Matter in the Laboratory (POF3-612) (POF3-612)

Appears in the scientific report 2020

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Database coverage:
; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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