Publication:
Modeling of GERDA Phase II data

Дата
2020
Авторы
Agostini, M.
Bakalyarov, A. M.
Balata, M.
Barabanov, I.
Belogurov, S.
Journal Title
Journal ISSN
Volume Title
Издатель
Научные группы
Логотип проекта
Научная группа
GERDA Collaboration
Организационные подразделения
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Организационная единица
Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
Выпуск журнала
Аннотация
© 2020, The Author(s).The GERmanium Detector Array (Gerda) experiment at the Gran Sasso underground laboratory (LNGS) of INFN is searching for neutrinoless double-beta (0νββ) decay of 76Ge. The technological challenge of Gerda is to operate in a “background-free” regime in the region of interest (ROI) after analysis cuts for the full 100 kg·yr target exposure of the experiment. A careful modeling and decomposition of the full-range energy spectrum is essential to predict the shape and composition of events in the ROI around Qββ for the 0νββ search, to extract a precise measurement of the half-life of the double-beta decay mode with neutrinos (2νββ) and in order to identify the location of residual impurities. The latter will permit future experiments to build strategies in order to further lower the background and achieve even better sensitivities. In this article the background decomposition prior to analysis cuts is presented for Gerda Phase II. The background model fit yields a flat spectrum in the ROI with a background index (BI) of 16.04−0.85+0.78·10−3 cts/(keV·kg·yr) for the enriched BEGe data set and 14.68−0.52+0.47·10−3 cts/(keV·kg·yr) for the enriched coaxial data set. These values are similar to the one of Phase I despite a much larger number of detectors and hence radioactive hardware components. [Figure not available: see fulltext.]
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Цитирование
Modeling of GERDA Phase II data / Agostini, M. [et al.] // Journal of High Energy Physics. - 2020. - 2020. - № 3. - 10.1007/JHEP03(2020)139
URI
https://www.doi.org/10.1007/JHEP03(2020)139
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85082593872&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000522419200001
 https://openrepository.mephi.ru/handle/123456789/20508
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