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

Research output: Contribution to journalArticle

Authors

  • LHCb Collaboration

Colleges, School and Institutes

External organisations

  • Institution Nikhef National Institute for Subatomic Physics
  • Universität Zürich
  • Universidad de Santiago de Compostela
  • BRISTOL UNIVERSITY
  • University of Michigan, Ann Arbor.
  • LPC
  • University of Cincinnati
  • Laboratori Nazionali dell'Infn di Frascati
  • Technische Universität Dortmund
  • European Organization for Nuclear Research (CERN)
  • University of Glasgow
  • Universitat de Barcelona
  • Petersburg Nuclear Physics Institute (PNPI)
  • Imperial College London
  • Universidade Federal Do Rio de Janeiro (UFRJ)
  • INFN Padova
  • IN2P3
  • Tsinghua University
  • Sezione INFN di Firenze
  • Laboratory of Photonics and Interfaces, Department de Chimie, Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne, Switzerland. ahmad@mpip-mainz.mpg.de
  • Sezione INFN di Ferrara
  • University of Maryland, College Park, Maryland 20742 USA
  • University of Manchester
  • Ruprecht-Karls-Universität Heidelberg
  • CNRS/IN2P3
  • Institute for High Energy Physics (IHEP)
  • Syracuse University, Syracuse, New York 13244, USA
  • Yandex School of Data Analysis
  • INFN Sezione di Cagliari
  • Institute of Physics

Abstract

The branching fractions of the doubly Cabibbo-suppressed decays D+→KK+K+, D+→ππ+K+ and Ds+→π K+K+ are measured using the decays D+→Kπ+π+ and Ds+→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+→KK+K+)/ℬ(D+→Kπ+π+) = (6.541±0.025±0.042)×10−4,
ℬ(D+→ππ+K+)/ℬ(D+→Kπ+π+) = (5.231±0.009±0.023)×10−3,
ℬ(Ds+→πK+K+)/ℬ(Ds+→KK+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.

Details

Original languageEnglish
Article number176
Number of pages24
JournalJournal of High Energy Physics
Volume2019
Issue number3
Publication statusPublished - 27 Mar 2019

Keywords

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

ASJC Scopus subject areas