Searches for 25 rare and forbidden decays of D + and Ds+ mesons

The LHCb Collaboration, Ulrik Egede, Tom Hadavizadeh, Mike P. Williams

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9 Citations (Scopus)


A search is performed for rare and forbidden charm decays of the form D(s)+→h±ℓ+ℓ(′)∓, where h± is a pion or kaon and ℓ(′)± is an electron or muon. The measurements are performed using proton-proton collision data, corresponding to an integrated luminosity of 1.6 fb−1, collected by the LHCb experiment in 2016. No evidence is observed for the 25 decay modes that are investigated and 90 % confidence level limits on the branching fractions are set between 1.4 × 10−8 and 6.4 × 10−6. In most cases, these results represent an improvement on existing limits by one to two orders of magnitude.

Original languageEnglish
Article number44
Number of pages24
JournalJournal of High Energy Physics
Issue number6
Publication statusPublished - Jun 2021


  • Charm physics
  • Flavour Changing Neutral Currents
  • Flavour physics
  • Hadron-Hadron scattering (experiments)
  • Rare decay

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