• Open Access

Search for trinucleon decay in the Majorana Demonstrator

S. I. Alvis et al. (Majorana Collaboration)
Phys. Rev. D 99, 072004 – Published 12 April 2019

Abstract

The Majorana Demonstrator is an ultra-low-background experiment searching for neutrinoless double-beta decay in Ge76. The heavily shielded array of germanium detectors, placed nearly a mile underground at the Sanford Underground Research Facility in Lead, South Dakota, also allows searches for new exotic physics. We present the first limits for trinucleon decay-specific modes and invisible decay modes for Ge isotopes. We find a half-life limit of 4.9×1025yr for the decay Ge76(ppn)Zn73 e+π+ and 4.7×1025yr for the decay Ge76(ppp)Cu73 e+π+π+. The half-life limit for the invisible triproton decay mode of Ge76 was found to be 7.5×1024yr.

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  • Received 3 December 2018

DOI:https://doi.org/10.1103/PhysRevD.99.072004

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Nuclear PhysicsParticles & Fields

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Vol. 99, Iss. 7 — 1 April 2019

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