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Gilliss, T; Abgrall, N; Alvis, S I; Arnquist, I J; Avignone, F T; Barabash, A S; Barton, C J; Bertrand, F E; Bode, T; Bradley, A W; Brudanin, V; Busch, M; Buuck, M; Caldwell, T S; Chan, Y-D; Christofferson, C D; Chu, P-H; Cuesta, C; Detwiler, J A; Dunagan, C; Efremenko, Yu; Ejiri, H; Elliott, S R; Giovanetti, G K; [...]

Progress Toward A 2νββ Measurement For The Majorana Demonstrator

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  • Medientyp: E-Artikel
  • Titel: Progress Toward A 2νββ Measurement For The Majorana Demonstrator
  • Beteiligte: Gilliss, T; Abgrall, N; Alvis, S I; Arnquist, I J; Avignone, F T; Barabash, A S; Barton, C J; Bertrand, F E; Bode, T; Bradley, A W; Brudanin, V; Busch, M; Buuck, M; Caldwell, T S; Chan, Y-D; Christofferson, C D; Chu, P-H; Cuesta, C; Detwiler, J A; Dunagan, C; Efremenko, Yu; Ejiri, H; Elliott, S R; Giovanetti, G K; [...]
  • Erschienen: IOP Publishing, 2020
  • Erschienen in: Journal of Physics: Conference Series
  • Sprache: Nicht zu entscheiden
  • DOI: 10.1088/1742-6596/1342/1/012117
  • ISSN: 1742-6588; 1742-6596
  • Schlagwörter: General Physics and Astronomy
  • Entstehung:
  • Anmerkungen:
  • Beschreibung: <jats:title>Abstract</jats:title> <jats:p>The MAJORANA DEMONSTRATOR is a <jats:sup>76</jats:sup>Ge-based neutrinoless double-beta decay (0<jats:italic>νββ</jats:italic>) experiment. Staged at the 4850 ft level of the Sanford Underground Research Facility, the DEMONSTRATOR operates an array of high-purity p-type point contact Ge detectors deployed within a graded passive shield and an active muon veto system. The present work concerns the two-neutrino double-beta decay mode (2<jats:italic>νββ</jats:italic>) of <jats:sup>76</jats:sup>Ge. For Ge detectors, having superior energy resolution (0.1%), this mode poses negligible background to the 0<jats:italic>νββ</jats:italic> mode, even for a ton-scale experiment. However, the measurement of the 2<jats:italic>νββ</jats:italic> mode allows for careful systematics checks of active detector mass, enrichment fraction, and pulse shape discrimination cuts related to both the 0<jats:italic>νββ</jats:italic> and 2<jats:italic>νββ</jats:italic> decay modes. A precision measurement of the 2<jats:italic>νββ</jats:italic> shape also allows searches for spectral distortions, possibly indicative of new physics, including 0<jats:italic>νββχ</jats:italic>. Work is underway to construct a full experimental background model enabling a Bayesian fit to the measured energy spectrum and extraction of a precise 2<jats:italic>νββ</jats:italic> spectrum and half-life.</jats:p>
  • Zugangsstatus: Freier Zugang