Initial Results from the Majorana Demonstrator
Abstract
The MAJORANA Collaboration has assembled an array of high purity Ge detectors to search for neutrinoless double-beta decay in Ge with the goal of establishing the required background and scalability of a Ge-based next-generation ton-scale experiment. The MAJORANA DEMONSTRATOR consists of 44 kg of high-purity Ge (HPGe) detectors (30 kg enriched in 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. Following a commissioning run that started in June 2015, the full detector array has been acquiring data since August 2016. We will discuss the status of the MAJORANA DEMONSTRATOR and initial results from the first physics run; including current background estimates, exotic low-energy physics searches, projections on the physics reach of the DEMONSTRATOR, and implications for a ton-scale Ge-based neutrinoless double-beta decay search.
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Cite
@article{arxiv.1711.11145,
title = {Initial Results from the Majorana Demonstrator},
author = {T. S. Caldwell and N. Abgrall and S. I. Alvis and I. J. Arnquist and F. T. Avignone and A. S. Barabash and C. J. Barton and F. E. Bertrand and T. Bode and B. Bos and A. W. Bradley and V. Brudanin and M. Busch and M. Buuck and Y-D. Chan and C. D. Christofferson and P. -H. Chu and C. Cuesta and J. A. Detwiler and C. Dunagan and Yu. Efremenko and H. Ejiri and S. R. Elliott and T. Gilliss and G. K. Giovanetti and M. P. Green and J. Gruszko and I. S. Guinn and V. E. Guiseppe and C. R. Haufe and L. Hehn and R. Henning and E. W. Hoppe and M. A. Howe and K. J. Keeter and M. F. Kidd and S. I. Konovalov and R. T. Kouzes and A. M. Lopez and R. D. Martin and R. Massarczyk and S. J. Meijer and S. Mertens and J. Myslik and C. O'Shaughnessy and G. Othman and W. Pettus and A. W. P. Poon and D. C. Radford and J. Rager and A. L. Reine and K. Rielage and R. G. H. Robertson and N. W. Ruof and B. Shanks and M. Shirchenko and A. M. Suriano and D. Tedeschi and J. E. Trimble and R. L. Varner and S. Vasilyev and K. Vetter and K. Vorren and B. R. White and J. F. Wilkerson and C. Wiseman and W. Xu and E. Yakushev and C. -H. Yu and V. Yumatov and I. Zhitnikov and B. X. Zhu},
journal= {arXiv preprint arXiv:1711.11145},
year = {2017}
}
Comments
Proceedings of TAUP 2017: XV International Conference on Topics in Astroparticle and Underground Physics (24-28 July 2017, Sudbury, ON, Canada)