Measurement of the branching fraction of the B0→Ds+π- decay

The LHCb Collaboration

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Abstract

A branching fraction measurement of the B0→Ds+π- decay is presented using proton–proton collision data collected with the LHCb experiment, corresponding to an integrated luminosity of 5.0fb-1. The branching fraction is found to be B(B0→Ds+π-)=(19.4±1.8 ± 1.3 ± 1.2) × 10 - 6, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the B→ D-π+, Ds+→K+K-π+ and D-→ K+π-π- branching fractions. This is the most precise single measurement of this quantity to date. As this decay proceeds through a single amplitude involving a b→ u charged-current transition, the result provides information on non-factorisable strong interaction effects and the magnitude of the Cabibbo–Kobayashi–Maskawa matrix element Vub. Additionally, the collision energy dependence of the hadronisation-fraction ratio fs/ fd is measured through B¯s0→Ds+π- and B→ D-π+ decays.

Original languageEnglish
Article number314
JournalEuropean Physical Journal C
Volume81
Issue number4
DOIs
Publication statusPublished - Apr 2021

OECD FOS+WOS

  • 1.03 PHYSICAL SCIENCES AND ASTRONOMY
  • 1.03.UP PHYSICS, PARTICLES & FIELDS

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