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High Energy Physics - Experiment

arXiv:1909.07509 (hep-ex)
[Submitted on 16 Sep 2019]

Title:Recent Results of the Majorana Demonstrator Experiment

Authors:J.M.López-Castaño
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Abstract:The MAJORANA DEMONSTRATOR is searching for neutrinoless double-beta decay in $^{76}$Ge with two modular arrays of natural and $^{76}$Ge-enriched germanium detectors. It is located at the 4850 level of Sanford Underground Research Facility in Lead, South Dakota, USA, and its total mass of germanium detectors is 44.1 kg, of which 29.7 kg is enriched. The analysis of the first 26 kg-yr of data provides an unprecedented energy resolution of 0.13% in the region of interest at 2039 keV and a background level of 15.4 $\pm$ 2.0 counts/(FWHM t yr). It establishes the lower limit of the half-life of neutrinoless double beta decay as 2.7 10$^{25}$ yr in 76Ge at 90% CL. This analysis will be summarized here with an emphasis on the energy determination.
Comments: MEDEX'19 proceedings. Since it was send to AIP, the last reference was published: S. I. Alvis et al. (Majorana Collaboration) Phys. Rev. C 100, 025501
Subjects: High Energy Physics - Experiment (hep-ex); Nuclear Experiment (nucl-ex); Instrumentation and Detectors (physics.ins-det)
Cite as: arXiv:1909.07509 [hep-ex]
  (or arXiv:1909.07509v1 [hep-ex] for this version)
  https://doi.org/10.48550/arXiv.1909.07509
Related DOI: https://doi.org/10.1063/1.5130979

Submission history

From: José Mariano López Castaño [view email]
[v1] Mon, 16 Sep 2019 22:43:30 UTC (151 KB)
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