Abstract
Searches are performed for both promptlike and long-lived dark photons, , produced in proton-proton collisions at a center-of-mass energy of 13 TeV, using decays and a data sample corresponding to an integrated luminosity of collected with the LHCb detector. The promptlike search covers the mass range from near the dimuon threshold up to 70 GeV, while the long-lived search is restricted to the low-mass region . No evidence for a signal is found, and 90% confidence level exclusion limits are placed on the kinetic-mixing strength. The constraints placed on promptlike dark photons are the most stringent to date for the mass range , and are comparable to the best existing limits for . The search for long-lived dark photons is the first to achieve sensitivity using a displaced-vertex signature.
- Received 15 December 2017
- Corrected 26 March 2018
DOI:https://doi.org/10.1103/PhysRevLett.120.061801
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
© 2018 CERN, for the LHCb Collaboration
Physics Subject Headings (PhySH)
Corrections
26 March 2018
Correction: The copyright statement contained an error and has been corrected.
Synopsis
LHC Sees No Dark Photons
Published 8 February 2018
A search for dark photons at the LHC comes up empty but puts new constraints on the strength of the hypothetical particles’ coupling to electromagnetic fields.
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