Publication:
Improved measurement of B-8 solar neutrinos with 1.5 kt . y of Borexino exposure

Дата
2020
Авторы
Agostini, M.
Altenmuller, K.
Appel, S.
Atroshchenko, V.
Litvinovich, E.
Machulin, I.
Skorokhvatov, M.
Journal Title
Journal ISSN
Volume Title
Издатель
Научные группы
Логотип проекта
Научная группа
Borexino Collaboration
Организационные подразделения
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Организационная единица
Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
Выпуск журнала
Аннотация
We report on an improved measurement of the B-8 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 Phi(ES)(8B) = 2.57(-0.18)(+0.17) (stat) (+0.07)(-0.07) (syst) x 10(6) 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, C-12(nu, nu')C-12* (E-gamma = 15.1 MeV).
Описание
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Цитирование
Improved measurement of B-8 solar neutrinos with 1.5 kt . y of Borexino exposure / Agostini, M [et al.] // Physical Review D. - 2020. - 101. - № 6. - 10.1103/PhysRevD.101.062001
URI
https://www.doi.org/10.1103/PhysRevD.101.062001
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85083516243&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000518459600001
 https://openrepository.mephi.ru/handle/123456789/20412
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