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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ID: 112662
2018
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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.
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Authors 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;
Journal physical review letters
Year 2018
DOI
10.1103/physrevlett.120.211804
URL
https://sciprofiles.com/publication/view/b68e0d2d3c7ed1582b417a07829a7230
Keywords
model majorana demonstrator detector charges lightly ionizing particles

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