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Measurements of the branching fractions of the decays Bs 0→ Ds∓ K± and B s0→ Ds- π+

  • R. Aaij
  • , C. Abellan Beteta
  • , B. Adeva
  • , M. Adinolfi
  • , C. Adrover
  • , A. Affolder
  • , Z. Ajaltouni
  • , J. Albrecht
  • , F. Alessio
  • , M. Alexander
  • , S. Ali
  • , G. Alkhazov
  • , P. Alvarez Cartelle
  • , A. A. Alves
  • , S. Amato
  • , Y. Amhis
  • , J. Anderson
  • , R. B. Appleby
  • , O. Aquines Gutierrez
  • , F. Archilli
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Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

The decay mode Bs0 → Ds ∓ K± allows for one of the theoretically cleanest measurements of the CKM angle γ through the study of time-dependent CP violation. This paper reports a measurement of its branching fraction relative to the Cabibbo-favoured mode Bs0 → Ds- π+ based on a data sample corresponding to 0.37 fb-1 of proton-proton collisions at √s = 7TeV collected in 2011 with the LHCb detector. In addition, the ratio of B meson production fractions fs=fd, determined from semileptonic decays, together with the known branching fraction of the control channel B0 → D-π+, is used to perform an absolute measurement of the branching fractions: B( Bs0 → D s- π+) = (2.95 ± 0.05 ± 0.17-0.22+0.18) × 10-3 ; B( B s0 → Ds∓ K ±) = (1.90 ± 0.12 ± 0.13-0.14 +0.12) × 10-4 ; where the first uncertainty is statistical, the second the experimental systematic uncertainty, and the third the uncertainty due to fs=fd. Copyright CERN.

Original languageEnglish
Article number115
JournalJournal of High Energy Physics
Volume2012
Issue number6
DOIs
Publication statusPublished - 1 Jan 2012
Externally publishedYes

Keywords

  • Hadron-hadron scattering

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