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Pulse shape analysis in GERDA Phase II

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dc.contributor.authorAgostini, M.
dc.contributor.authorAraujo, G.
dc.contributor.authorBakalyarov, A. M.
dc.contributor.authorBalata, M.
dc.contributor.authorBelogurov, S.
dc.contributor.authorБелогуров, Сергей Геннадьевич
dc.date.accessioned2024-12-26T11:01:19Z
dc.date.available2024-12-26T11:01:19Z
dc.date.issued2022
dc.description.abstractThe GERmanium Detector Array (GERDA) collaboration searched for neutrinoless double-beta decay in Ge-76 using isotopically enriched high purity germanium detectors at the Laboratori Nazionali del Gran Sasso of INFN. After Phase I (2011-2013), the experiment benefited from several upgrades, including an additional active veto based on LAr instrumentation and a significant increase of mass by point-contact germanium detectors that improved the halflife sensitivity of Phase II (2015-2019) by an order of magnitude. At the core of the background mitigation strategy, the analysis of the time profile of individual pulses provides a powerful topological discrimination of signal-like and background-like events. Data from regular Th-228 calibrations and physics data were both considered in the evaluation of the pulse shape discrimination performance. In this work, we describe the various methods applied to the data collected in GERDA Phase II corresponding to an exposure of 103.7 kg year. These methods suppress the background by a factor of about 5 in the region of interest around Q(beta beta) = 2039 keV, while preserving (81 +/- 3)% of the signal. In addition, an exhaustive list of parameters is provided which were used in the final data analysis.
dc.identifier.citationPulse shape analysis in GERDA Phase II / Agostini, M [et al.] // European Physical Journal C. - 2022. - 82. - № 4. - 10.1140/epjc/s10052-022-10163-w
dc.identifier.doi10.1140/epjc/s10052-022-10163-w
dc.identifier.urihttps://www.doi.org/10.1140/epjc/s10052-022-10163-w
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85130023958&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000777159100003
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/28982
dc.relation.ispartofEuropean Physical Journal C
dc.titlePulse shape analysis in GERDA Phase II
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue4
oaire.citation.volume82
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