First Limit on the Direct Detection of Lightly Ionizing Particles for Electric Charge as Low as e/1000 with the Majorana Demonstrator
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First Limit on the Direct Detection of Lightly Ionizing Particles for Electric Charge as Low as e/1000 with the Majorana Demonstrator

S. I. Alvis,I. J. Arnquist,F. T. Avignone,A. S. Barabash,C. J. Barton,F. E. Bertrand,V. Brudanin,M. Busch,M. Buuck,T. S. Caldwell,Y-D. Chan,C. D. Christofferson,Pinghan Chu,C. Cuesta,J. A. Detwiler,C. Dunagan,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,L. Hehn,R. Henning,E. W. Hoppe,M. A. Howe,S. I. Konovalov,R. T. Kouzes,A. M. Lopez,R.D. Martin,R. Massarczyk,S. J. Meijer,S. Mertens,J. Myslik,C. O’Shaughnessy,G. Othman,Walter Pettus,A. W. P. Poon,D.C. Radford,J. Rager,A. L. Reine,K. Rielage,R.G. Hamish Robertson,N. W. Ruof,B. Shanks,M. Shirchenko,A. M. Suriano,D. Tedeschi,R. L. Varner,S. Vasilyev,K. Vorren,B. R. White,J. F. Wilkerson,C. Wiseman,W. Xu,E. Yakushev,C.-H. Yu,V. Yumatov,I. Zhitnikov,B. X. Zhu,Majorana Collaboration;S. I. Alvis;I. J. Arnquist;F. T. Avignone;A. S. Barabash;C. J. Barton;F. E. Bertrand;V. Brudanin;M. Busch;M. Buuck;T. S. Caldwell;Y-D. Chan;C. D. Christofferson;Pinghan Chu;C. Cuesta;J. A. Detwiler;C. Dunagan;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;L. Hehn;R. Henning;E. W. Hoppe;M. A. Howe;S. I. Konovalov;R. T. Kouzes;A. M. Lopez;R.D. Martin;R. Massarczyk;S. J. Meijer;S. Mertens;J. Myslik;C. O’Shaughnessy;G. Othman;Walter Pettus;A. W. P. Poon;D.C. Radford;J. Rager;A. L. Reine;K. Rielage;R.G. Hamish Robertson;N. W. Ruof;B. Shanks;M. Shirchenko;A. M. Suriano;D. Tedeschi;R. L. Varner;S. Vasilyev;K. Vorren;B. R. White;J. F. Wilkerson;C. Wiseman;W. Xu;E. Yakushev;C.-H. Yu;V. Yumatov;I. Zhitnikov;B. X. Zhu;Majorana Collaboration;
physical review letters 2018 Vol. 120 pp. 211804-
252
collaboration2018physicalfirst

Abstract

The Majorana Demonstrator is an ultralow-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. Free, relativistic, lightly ionizing particles with an electrical charge less than e are forbidden by the standard model but predicted by some of its extensions. If such particles exist, they might be detected in the Majorana Demonstrator by searching for multiple-detector events with individual-detector energy depositions down to 1 keV. This search is background-free, and no candidate events have been found in 285 days of data taking. New direct-detection limits are set for the flux of lightly ionizing particles for charges as low as e/1000.

Keywords

model majorana demonstrator detector charges lightly ionizing particles

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DOI:
10.1103/physrevlett.120.211804
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https://sciprofiles.com/publication/view/b68e0d2d3...

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