The Majorana Demonstrator Status and Preliminary Results
Abstract
The Majorana Collaboration is using an array of high-purity Ge detectors to search for neutrinoless double-beta decay in 76Ge. Searches for neutrinoless double-beta decay are understood to be the only viable experimental method for testing the Majorana nature of the neutrino. Observation of this decay would imply violation of lepton number, that neutrinos are Majorana in nature, and provide information on the neutrino mass. The Majorana Demonstrator comprises 44.1 kg of p-type point-contact Ge detectors (29.7 kg enriched in 76Ge) surrounded by a low-background shield system. The experiment achieved a high efficiency of converting raw Ge material to detectors and an unprecedented detector energy resolution of 2.5 keV FWHM at Q. The Majorana collaboration began taking physics data in 2016. This paper summarizes key construction aspects of the Demonstrator and shows preliminary results from initial data.
Keywords
Cite
@article{arxiv.1803.11220,
title = {The Majorana Demonstrator Status and Preliminary Results},
author = {C. -H. Yu 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 V. Brudanin and M. Busch and M. Buuck and T. S. Caldwell 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. 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 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 N. W. Ruff and B. Shanks and M. Shirchenko and A. M. Suriano and D. Tedeschi 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 V. Yumatov and I. Zhitnikov and B. Z. Zhu},
journal= {arXiv preprint arXiv:1803.11220},
year = {2018}
}
Comments
5 pages, 2 figures. Proceeding for the "16th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics (CGS16)", 18-22 September 2017