Aachen 2019 – scientific programme
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T: Fachverband Teilchenphysik
T 80: Neutrinophysik IV
T 80.3: Talk
Thursday, March 28, 2019, 16:35–16:50, S06
Analytical Multivariate Studies in the Borexino Solar Neutrino Analysis — Livia Ludhova1,2, Simone Marcocci3, •Ömer Penek1,2, and Alina Vishneva4 for the Borexino collaboration — 1IKP-2, Forschungszentrum Jülich — 2III. Physikalisches Institut, RWTH Aachen University — 3Gran Sasso Science Institute, L’Aquila — 4Joint Institute for Nuclear Research, Dubna
The Borexino detector, located at the Laboratori Nazionali del Gran Sasso in Italy, is a liquid scintillator detector with a primary goal to measure solar neutrinos. The spectral fit of the energy spectrum has been performed for the first time in the whole energy range from 0.19 up to 2.93 MeV. To increase the sensitivity for pep and CNO neutrinos, the multivariate fit technique has been developed, which takes into account additional information of the radial and pulse shape distributions of events. The talk shows the analytical multivariate fitting strategy used to obtain the new Borexino results for the 7Be, pp, and pep rates and the sensitivity of the Borexino detector to measure CNO neutrinos. This talk is presented in the name of the Borexino Collaboration.