17-22 July 2016
Master Cutlers Hall
Europe/London timezone

A search for bosonic dark matter with the MAJORANA DEMONSTRATOR

18 Jul 2016, 15:40
20m
Venue: Cutlers' Banqueting Hall (First Floor); Chair: Gabriella Sciolla; Session Manager: Frederic Mouton ()

Venue: Cutlers' Banqueting Hall (First Floor); Chair: Gabriella Sciolla; Session Manager: Frederic Mouton

Speaker

Thomas Caldwell (UNC)

Description

The MAJORANA Collaboration has assembled an array of high purity Ge detectors to search for neutrinoless double-beta decay in $^{76}$Ge with the goal of establishing the required background and scalability of a Ge-based next-generation tonne-scale experiment. The MAJORANA DEMONSTRATOR consists of 44 kg of high-purity Ge (HPGe) detectors (30 kg enriched in $^{76}$Ge) with a low-noise p-type point contact (PPC) geometry. The detectors are split between two modules which are contained in a single lead and high-purity copper shield at the Sanford Underground Research Facility in Lead, South Dakota. The first module has been operating since June 2015 and the second is currently being commissioned. The low energy threshold achieved with the PPC HPGe detectors, combined with the low backgrounds of the DEMONSTRATOR, give the experiment a compelling low-energy physics program with sensitivity to dark matter and axion searches. We present the results of searches for bosonic dark matter and other rare event searches using data from the commissioning and first physics runs that improve upon existing limits.

Primary author

Presentation Materials

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