Measurement of the branching fraction and CP asymmetry in B+→J/ψρ+ decays

Research output: Contribution to journalArticlepeer-review

Authors

  • LHCb Collaboration

Colleges, School and Institutes

External organisations

  • Institute of Physics
  • Ecole Polytechnique Federale de Lausanne
  • CERN
  • Nikhef National Institute for Subatomic Physics
  • University of Zurich
  • Universidad de Santiago de Compostela
  • University of Bristol
  • University of Michigan
  • LPC
  • University of Cincinnati
  • Laboratori Nazionali dell'Infn di Frascati
  • TU Dortmund University, Germany
  • University of Glasgow
  • Universitat de Barcelona
  • Petersburg Nuclear Physics Institute (PNPI)
  • Imperial College London
  • Universidade Federal Do Rio de Janeiro
  • INFN Padova
  • IN2P3
  • Tsinghua University
  • Sezione INFN di Firenze
  • Sezione INFN di Ferrara
  • University of Maryland
  • Ruprecht-Karls-Universität Heidelberg
  • Institute for High Energy Physics (IHEP)
  • Syracuse University
  • Yandex School of Data Analysis
  • INFN Sezione di Cagliari
  • University of Warwick
  • Max-Planck-Institut für Kernphysik (MPIK)

Abstract

The branching fraction and direct CP asymmetry of the decay B+→J/ψρ+ are measured using proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV, corresponding to a total integrated luminosity of 3fb-1. The following results are obtained:

ℬ(B+→J/ψρ+)=(3.81-0.24+0.25±0.35)×10-5,
CP(B+→J/ψρ+)=-0.045-0.057+0.056±0.008,

where the first uncertainties are statistical and the second systematic. Both measurements are the most precise to date.

Details

Original languageEnglish
Article number537
Number of pages13
JournalEuropean Physical Journal C
Volume79
Issue number6
Publication statusPublished - 24 Jun 2019