@inproceedings{e26ed9900c9b4c748879e7b4bed40d38,
title = "The Low Polonium Field of Borexino and its significance for the CNO neutrino detection",
abstract = "Borexino is a liquid scintillator detector located at the Laboratori Nazionale del Gran Sasso, Italy with the main goal to measure solar neutrinos. The experiment recently provided the first direct experimental evidence of CNO-cycle neutrinos in the Sun, rejecting the no-CNO signal hypothesis with a significance greater than 5σ at 99%C.L. The intrinsic210Bi is an important background for this analysis due to its similar spectral shape to that of CNO neutrinos.210Bi can be measured through its daughter210Po which can be distinguished through an event-by-event basis via pulse shape discrimination. However, this required reducing the convective motions in the scintillator that brought additional210Po from peripheral sources. This was made possible through the thermal insulation and stabilization campaign performed between 2015 and 2016. This article will explain the strategy and the different methods performed to extract the210Bi upper limit in Phase-III (Jul 2016- Feb 2020) of the experiment through the analysis of210Po in the cleanest region of the detector called the Low Polonium Field.",
author = "{Borexino Collaboration} and S. Kumaran 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 R. Biondi and D. Bravo and B. Caccianiga and F. Calaprice and A. Caminata and P. Cavalcante and A. Chepurnov and D. D{\textquoteright}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 C. Ghiano and M. Giammarchi and A. Goretti and G{\"o}ttel, {A. S.} and M. Gromov and D. Guffanti and Aldo Ianni and Andrea Ianni and A. Jany and D. Jeschke and V. Kobychev and G. Korga and M. Laubenstein and E. Litvinovich and P. Lombardi and I. Lomskaya and L. Ludhova and G. Lukyanchenko and L. Lukyanchenko and I. Machulin and L. Oberauer and S. Sch{\"o}nert",
note = "Publisher Copyright: {\textcopyright} 2021 Proceedings of the 55th Rencontres de Moriond - 2021 Electroweak Interactions and Unified Theories, EW 2021. All Rights Reserved.; 55th Rencontres de Moriond on Electroweak Interactions and Unified Theories, EW 2021 ; Conference date: 20-03-2021 Through 27-03-2021",
year = "2021",
language = "English",
series = "Proceedings of the 55th Rencontres de Moriond - 2021 Electroweak Interactions and Unified Theories, EW 2021",
publisher = "ARISF",
pages = "441--444",
editor = "Etienne Auge and Jacques Dumarchez and {Tran Thanh Van}, Jean",
booktitle = "Proceedings of the 55th Rencontres de Moriond - 2021 Electroweak Interactions and Unified Theories, EW 2021",
}