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First Search for Dyons with the Full MoEDAL Trapping Detector in 13 TeV pp Collisions

Research output: Contribution to journalArticlepeer-review

(MoEDAL Collaboration)

Original languageEnglish
Article number071801
JournalPhysical Review Letters
Issue number7
Published19 Feb 2021

Bibliographical note

Funding Information: We thank CERN for the LHC’s successful run-2 operation, as well as the support staff from our institutions without whom MoEDAL could not be operated. We acknowledge the invaluable assistance of particular members of the LHCb Collaboration: G. Wilkinson, R. Lindner, E. Thomas, and G. Corti. Computing support was provided by the GridPP Collaboration, in particular, by the Queen Mary University of London and Liverpool grid sites. This work was supported by Grant No. PP00P2_150583 of the Swiss NSF; by the United Kingdom Science and Technology Facilities Council, via Grants No. ST/L000326/1, No. ST/L00044X/1, No. ST/N00101X/1, No. ST/P000258/1, and No. ST/T000759/1; by the Generalitat Valenciana via a special grant for MoEDAL and via the projects PROMETEO-II/2017/033 and PROMETEO/2019/087; by MCIU/AEI/FEDER, UE via Grants No. FPA2016-77177-C2-1-P, No. FPA2017-85985-P, No. FPA2017-84543-P, and No. PGC2018-094856-B-I00; by the Physics Department of King’s College London; by NSERC via a project grant; by the V-P Research of the University of Alberta (UofA); by the Provost of the UofA; by UEFISCDI (Romania); by the INFN (Italy); by the Estonian Research Council via a Mobilitas Plus grant MOBTT5; by a National Science Foundation grant (United States) to the University of Alabama MoEDAL group; and by European Research Council, Grant No. MOBTT5. Publisher Copyright: © 2021 authors. Published by the American Physical Society. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

King's Authors


The MoEDAL trapping detector consists of approximately 800 kg of aluminum volumes. It was exposed during run 2 of the LHC program to 6.46 fb-1 of 13 TeV proton-proton collisions at the LHCb interaction point. Evidence for dyons (particles with electric and magnetic charge) captured in the trapping detector was sought by passing the aluminum volumes comprising the detector through a superconducting quantum interference device (SQUID) magnetometer. The presence of a trapped dyon would be signaled by a persistent current induced in the SQUID magnetometer. On the basis of a Drell-Yan production model, we exclude dyons with a magnetic charge ranging up to five Dirac charges (5gD) and an electric charge up to 200 times the fundamental electric charge for mass limits in the range 870-3120 GeV and also monopoles with magnetic charge up to and including 5gD with mass limits in the range 870-2040 GeV.

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