pith. sign in

arxiv: 1902.02299 · v1 · pith:WLUH5LRKnew · submitted 2019-02-06 · ⚛️ nucl-ex · hep-ex

A Search for Neutrinoless Double-Beta Decay in ⁷⁶Ge with 26 kg-yr of Exposure from the MAJORANA DEMONSTRATOR

S.I. Alvis , I.J. Arnquist , F.T. Avignone III , A.S. Barabash , C.J. Barton , V. Basu , F.E. Bertrand , B. Bos
show 56 more authors
M. Busch M. Buuck T.S. Caldwell Y-D. Chan C.D. Christofferson P.-H. Chu C. Cuesta J.A. Detwiler Yu. Efremenko H. Ejiri S.R. Elliott T. Gilliss G.K. Giovanetti M.P. Green J. Gruszko I.S. Guinn V.E. Guiseppe C.R. Haufe R.J. Hegedus L. Hehn R. Henning D. Hervas Aguilar E.W. Hoppe M.A. Howe M.F. Kidd S.I. Konovalov R.T. Kouzes A.M. Lopez R.D. Martin R. Massarczyk S.J. Meijer S. Mertens J. Myslik G. Othman W. Pettus A. Piliounis A.W.P. Poon D.C. Radford J. Rager A.L. Reine K. Rielage N.W. Ruof B. Shanks M. Shirchenko D. Tedeschi R.L. Varner S. Vasilyev B.R. White J.F. Wilkerson C. Wiseman W. Xu E. Yakushev C.-H. Yu V. Yumatov I. Zhitnikov B.X. Zhu
This is my paper
classification ⚛️ nucl-ex hep-ex
keywords decaydouble-betamajorananeutrinolessdemonstratorsearchbackgroundbeta
0
0 comments X
read the original abstract

The MAJORANA Collaboration is operating an array of high purity Ge detectors to search for the neutrinoless double-beta decay of $^{76}$Ge. The MAJORANA DEMONSTRATOR consists of 44.1 kg of Ge detectors (29.7 kg enriched to 88% in $^{76}$Ge) split between two modules constructed from ultra-clean materials. Both modules are contained in a low-background shield at the Sanford Underground Research Facility in Lead, South Dakota. We present updated results on the search for neutrinoless double-beta decay in $^{76}$Ge with $26.0\pm0.5$ kg-yr of enriched exposure. With the DEMONSTRATOR's unprecedented energy resolution of 2.53 keV FWHM at $Q_{\beta\beta}$, we observe one event in the region of interest with 0.65 events expected from the estimated background, resulting in a lower limit on the $^{76}$Ge neutrinoless double-beta decay half-life of $2.7\times10^{25}$ yr (90% CL) with a median sensitivity of $4.8\times10^{25}$ yr (90% CL). Depending on the matrix elements used, a 90% CL upper limit on the effective Majorana neutrino mass in the range of 200-433 meV is obtained. The measured background in the low-background configurations is $11.9\pm2.0$ counts/(FWHM t yr).

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Amplifying muon-to-positron conversion in nuclei with ultralight dark matter

    hep-ph 2025-07 unverdicted novelty 6.0

    Ultralight scalar dark matter amplifies the lepton-flavor-violating muon-to-positron conversion rate via an effective Majorana mass m_μe, yielding new constraints on flavor-off-diagonal neutrino couplings from SINDRUM...

  2. Neutrino Masses from the Point of View of Economy and Simplicity

    hep-ph 2019-07 unverdicted novelty 2.0

    Neutrino masses are unlikely to share the Standard Model origin of other fermion masses, with the Weinberg effective Lagrangian providing the simplest beyond-Standard-Model mechanism for small Majorana masses.