Search for CP violation in D+s → K0Sπ+, D→ K0SK+, and D+ → ϕπ+ decays

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Authors

  • LHCb Collaboration

Colleges, School and Institutes

External organisations

  • Institution Nikhef National Institute for Subatomic Physics
  • Universitat de Barcelona
  • Universitat Ramon Llull
  • Universidad de Santiago de Compostela
  • University of Bristol
  • CNRS/IN2P3
  • University of Liverpool
  • LPC
  • Technische Universität Dortmund
  • European Organization for Nuclear Research (CERN)
  • University of Glasgow
  • Petersburg Nuclear Physics Institute (PNPI)
  • Department of Physics and Astronomy and INFN
  • Universidade Federal Do Rio de Janeiro (UFRJ)
  • INFN Padova
  • IN2P3
  • Sezione INFN di Firenze
  • University of Florence
  • Universität Zürich
  • University of Cincinnati
  • University of Manchester
  • Max-Planck-Institut für Kernphysik (MPIK)
  • Laboratori Nazionali dell'Infn di Frascati
  • Institute for High Energy Physics (IHEP)
  • Syracuse University, Syracuse, New York 13244, USA
  • Università della Basilicata
  • Ruprecht-Karls-Universität Heidelberg
  • Warwick University
  • Pontifícia Universidade Católica Do Rio de Janeiro (PUC-Rio)
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Sezione INFN di Ferrara
  • University of Cambridge
  • Laboratory of Photonics and Interfaces, Department de Chimie, Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne, Switzerland. ahmad@mpip-mainz.mpg.de
  • University College Dublin
  • Institute for Nuclear Research, Russian Academy of Sciences
  • Department of Biology and Evolution; University of Ferrara; Ferrara; Italy
  • Imperial College London
  • School of Physics

Abstract

A search for charge-parity (CP) violation in Cabibbo-suppressed D+s → K0Sπ+, D→ K0SK+, and D+ → ϕπ decays is reported using proton-proton collision data, corresponding to an integrated luminosity of 3.8 fb−1 , collected at a center-of-mass energy of 13 TeV with the LHCb detector. High-yield samples of kinematically and topologically similar Cabibbo-favored D+(s) decays are analyzed to subtract nuisance asymmetries due to production and detection effects, including those induced by CP violation in the neutral kaon system. The results are

ACP(D+→ K0Sπ+) = (1.3±1.9±0.5)×10−3,

ACP(D→ K0SK+) = (−0.09±0.65±0.48)×10−3,

ACP(D→ ϕπ+) = (0.05±0.42±0.29)×10−3,


where the first uncertainties are statistical and the second systematic. They are the most precise measurements of these quantities to date, and are consistent with CP symmetry. A combination with previous LHCb measurements, based on data collected at 7 and 8 TeV, is also reported. 

Details

Original languageEnglish
Article number191803
Number of pages11
JournalPhysical Review Letters
Volume122
Issue number19
Publication statusPublished - 17 May 2019

ASJC Scopus subject areas