Measurement of the branching fractions of the decays D+ → KK+K+, D+ → ππ+K+ and Ds+ → πK+K+

The LHCb Collaboration

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Abstract

The branching fractions of the doubly Cabibbo-suppressed decays D + → K − K + K + , D + → π − π + K + and D s + → π − K + K + are measured using the decays D + → K − π + π + and D s + → K − K + π + as normalisation channels. The measurements are performed using proton-proton collision data collected with the LHCb detector at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 2.0 fb −1 . The results are
ℬ(D+→K−K+K+)ℬ(D+→K−π+π+)=(6.541±0.025±0.042)×10−4,ℬ(D+→π−π+K+)ℬ(D+→K−π+π+)=(5.231±0.009±0.023)×10−3,ℬ(Ds+→π−K+K+)ℬ(Ds+→K−K+π+),=(2.372±0.024±0.025)×10−3,
where the uncertainties are statistical and systematic, respectively. These are the most precise measurements up to date.
Original languageEnglish
Article number176
Number of pages24
JournalJournal of High Energy Physics
Volume2019
Issue number3
DOIs
Publication statusPublished - 2019
Externally publishedYes

Keywords

  • Branching fraction
  • Charm physics
  • Flavor physics
  • Hadron-Hadron scattering (experiments)

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