Measurement of |Vcb | with Bs0 → Ds (∗)- μ+νμ decays

Research output: Contribution to journalArticle

Authors

  • LHCb Collaboration

Colleges, School and Institutes

External organisations

  • Nikhef National Institute for Subatomic Physics
  • Universität Zürich
  • University of Liverpool
  • Universidad de Santiago de Compostela
  • BRISTOL UNIVERSITY
  • Université Clermont Auvergne
  • University of Michigan, Ann Arbor.
  • Istituto Nazionale di Fisica Nucleare, Sezione di Milano
  • Los Alamos National Laboratory
  • Laboratori Nazionali dell'Infn di Frascati
  • Technische Universität Dortmund
  • European Organization for Nuclear Research (CERN)
  • University of Glasgow
  • Universitat Autònoma de Barcelona
  • Petersburg Nuclear Physics Institute (PNPI)
  • Imperial College London
  • Universidade Federal Do Rio de Janeiro (UFRJ)
  • Université Paris-Saclay
  • 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
  • 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
  • THE UNIVERSITY OF WARWICK
  • Institute of Physics

Abstract

The element |Vcb| of the Cabibbo-Kobayashi-Maskawa matrix is measured using semileptonic Bs0 decays produced in proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb-1. Rates of Bs0→Ds-μ+νμ and Bs0→Ds∗-μ+νμ decays are analyzed using hadronic form-factor parametrizations derived either by Caprini, Lellouch and Neubert (CLN) or by Boyd, Grinstein and Lebed (BGL). The measured values of |Vcb| are (41.4±0.6±0.9±1.2)×10-3 and (42.3±0.8±0.9±1.2)×10-3 in the CLN and BGL parametrization, respectively. The first uncertainty is statistical, the second systematic, and the third is due to the external inputs used in the measurement. These results are in agreement with those obtained from decays of B+ and B0 mesons. They are the first determinations of |Vcb| at a hadron-collider experiment and the first using Bs0 meson decays.

Details

Original languageEnglish
Article number072004
JournalPhysical Review D
Volume101
Issue number7
Publication statusPublished - 1 Apr 2020

ASJC Scopus subject areas