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Measurement of | V c b | with B s 0 → D s ( * ) − μ + ν μ decays
Name
PhysRevD.101.072004.pdf
Description
Published version
Size
919.25 KB
Format
Adobe PDF
Checksum (MD5)
8a9687ba218ecfcee4a8a79af6d937b8
Date Issued
2020
Journal
Physical Review D
Publisher
American Physical Society (APS)
Version
Final published version
Abstract
© 2020 CERN. © 2020 CERN, for the LHCb Collaboration. Funded by SCOAP 3 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.
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DOI of Published Version
10.1103/PHYSREVD.101.072004
