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Bonn 2020 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 56: Experimental methods III

T 56.2: Vortrag

Mittwoch, 1. April 2020, 16:45–17:00, H-ÜR 1

Pile-up in the Borexino experiment — •Alexandre Göttel1,2, Zara Bagdasarian1, Mariia Redchuk1,2, Sindhuja Kumaran1,2, Livia Ludhova1,2, Ömer Penek1,2, Giulio Settanta1, and Apeksha Singhal1,21IKP-2, FzJ — 2RWTH Aachen University

In particle physics, pile-up refers to recorded physics events in which two or more uncorrelated physical processes occur so close in time that the detector is unable to correctly distinguish between them. The Borexino Detector is a liquid scintillator detector located at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy. It was built with the primary goal of detecting solar neutrinos, with an unprecedented sensitivity below 2 MeV. Because of similarities in the rate and spectral shape of pile-up events and low-energy solar neutrino events, pile-up is one of the most crucial backgrounds in the energy range of Borexino's solar neutrinos measurement (e.g. neutrinos from the pp-chain, and from the CNO-chain). Therefore it is extremely important to tightly constrain the spectral shape and rate of pile-up events for different energy estimators. In this talk the methods used to estimate pile-up in Borexino will be presented, and the results will be discussed alongside the different sources of statistical and systematic uncertainty.

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