Recent Results from the Majorana Demonstrator

arXiv: Instrumentation and Detectors(2018)

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摘要
The MAJORANA DEMONSTRATOR is an experiment constructed to search forneutrinoless double-beta decay in $^{76}$Ge and to demonstrate the feasibilityto deploy a large-scale experiment in a phased and modular fashion. It consistsof two modules of natural and $^{76}$Ge-enriched germanium detectors totalling44.1 kg, operating at the 4850u0027 level of the Sanford Underground ResearchFacility in Lead, South Dakota, USA. Commissioning of the experiment began inJune 2015, followed by data production with the full detector array in August2016. The ultra-low background and record energy resolution achieved by theMAJORANA DEMONSTRATOR enable a sensitive neutrinoless double-beta decay search,as well as additional searches for physics beyond the Standard Model. I willdiscuss the design elements that enable these searches, along with the latestresults, focusing on the neutrinoless double-beta decay search. I will alsodiscuss the current status and the future plans of the MAJORANA DEMONSTRATOR,as well as the plans for a future tonne-scale $^{76}$Ge experiment.
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关键词
Neutrinoless double-beta decay,germanium,point-contact detectors
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