The Borexino collaboration has recently released the first simultaneous measurement of the interaction rates of pp, 7Be and pep solar neutrinos. This result was made possible by the unprecedented low background of the scintillator during Phase-II, together with new data analysis techniques. We present the data selection strategy of the Borexino solar neutrino analysis: we describe how we select the neutrino-like scintillation events according to event-based cuts which eliminate most of the external and cosmogenic backgrounds. We describe also how the spatial distribution of events and a β+/β- pulse shape discrimination variable are used in a multivariate fit approach to additionally constrain the residual cosmogenic 11C and external backgrounds.

Data selection strategy for solar neutrino analysis with Borexino / S. Caprioli, C. Ghiano, A. Re, M. Redchuck. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - 1342:1(2020), pp. 012110.1-012110.5. ((Intervento presentato al 15. convegno International Conference on Topics in Astroparticle and Underground Physics tenutosi a Sudbury nel 2017 [10.1088/1742-6596/1342/1/012110].

Data selection strategy for solar neutrino analysis with Borexino

S. Caprioli
Primo
;
A. Re
Penultimo
;
2020

Abstract

The Borexino collaboration has recently released the first simultaneous measurement of the interaction rates of pp, 7Be and pep solar neutrinos. This result was made possible by the unprecedented low background of the scintillator during Phase-II, together with new data analysis techniques. We present the data selection strategy of the Borexino solar neutrino analysis: we describe how we select the neutrino-like scintillation events according to event-based cuts which eliminate most of the external and cosmogenic backgrounds. We describe also how the spatial distribution of events and a β+/β- pulse shape discrimination variable are used in a multivariate fit approach to additionally constrain the residual cosmogenic 11C and external backgrounds.
Settore FIS/01 - Fisica Sperimentale
Settore FIS/04 - Fisica Nucleare e Subnucleare
City of Greater Sudbury
Institute of Particle Physics
International Union of Pure and Applied Physicists
IOP Publishing
Vale
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/885338
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