Measurements of the branching fractions of Λc+→pππ+, Λc+→ pKK+, and Λc+→pπK+

Research output: Contribution to journalArticlepeer-review

Authors

  • LHCb Collaboration

Colleges, School and Institutes

External organisations

  • European Organization for Nuclear Research (CERN)
  • Universidad de Santiago de Compostela
  • BRISTOL UNIVERSITY
  • LPC
  • University of Cincinnati
  • Technische Universität Dortmund
  • University of Glasgow
  • Universitat Autònoma de Barcelona
  • Nikhef National Institute for Subatomic Physics
  • Petersburg Nuclear Physics Institute (PNPI)
  • Imperial College London
  • Universidade Federal Do Rio de Janeiro (UFRJ)
  • Department of Physics and Astronomy and INFN
  • IN2P3
  • Tsinghua University
  • Department of Biology and Evolution; University of Ferrara; Ferrara; Italy
  • 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
  • THE UNIVERSITY OF WARWICK
  • Universitat Ramon Llull
  • Pontifícia Universidade Católica Do Rio de Janeiro (PUC-Rio)
  • Laboratoire Leprince-Ringuet
  • Yandex School of Data Analysis

Abstract

The ratios of the branching fractions of the decays Λc+→pππ+, Λc+→pKK+, and Λc+→pπK+ with respect to the Cabibbo-favoured Λc+→ pKπ+ decay are measured using proton-proton collision data collected with the LHCb experiment at a 7 TeV centre-of-mass energy and corresponding to an integrated luminosity of 1.0 fb−1:

ℬ(Λc+→pππ+)/ℬ(Λc+→pKπ+) =(7.44±0.08±0.18)%,
ℬ(Λc+→pKK+)/ℬ(Λc+→pKπ+)=(1.70±0.03±0.03)%,
ℬ(Λc+→pπK+)/ℬ(Λc+→pKπ+)=(0.165±0.015±0.005)%,


where the uncertainties are statistical and systematic, respectively. These results are the most precise measurements of these quantities to date. When multiplied by the world-average value for ℬ(Λc+→pKπ+), the corresponding branching fractions are

ℬ(Λc+→pππ+)=(4.72±0.05±0.11±0.25)×10−3,
ℬ(Λc+→pKK+)=(1.08±0.02±0.02±0.06)×10−3,
ℬ(Λc+→pπK+)=(1.04±0.09±0.03±0.05)×10−4,

where the final uncertainty is due to ℬ(Λc+→pK−π+).

Details

Original languageEnglish
Article number43
Number of pages23
JournalJournal of High Energy Physics
Volume2018
Issue number3
Publication statusPublished - 8 Mar 2018

Keywords

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

ASJC Scopus subject areas