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Measurement of the B ̄s0 → D s- Ds+ and ̄ Bs 0 → D-Ds+ effective lifetimes

  • R. Aaij
  • , B. Adeva
  • , M. Adinolfi
  • , A. Affolder
  • , Z. Ajaltouni
  • , J. Albrecht
  • , F. Alessio
  • , M. Alexander
  • , S. Ali
  • , G. Alkhazov
  • , P. Alvarez Cartelle
  • , A. A. Alves
  • , S. Amato
  • , S. Amerio
  • , Y. Amhis
  • , L. Anderlini
  • , J. Anderson
  • , R. Andreassen
  • , M. Andreotti
  • , J. E. Andrews
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Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

The first measurement of the effective lifetime of the B̄s0 meson in the decay B̄s0→Ds-Ds+ is reported using a proton-proton collision data set, corresponding to an integrated luminosity of 3 fb-1, collected by the LHCb experiment. The measured value of the B̄s0→Ds-Ds+ effective lifetime is 1.379±0.026±0.017 ps, where the uncertainties are statistical and systematic, respectively. This lifetime translates into a measurement of the decay width of the light B̄s0 mass eigenstate of ΓL=0.725±0. 014±0.009 ps-1. The B̄s0 lifetime is also measured using the flavor-specific B̄s0→D-Ds+ decay to be 1.52±0.15±0.01 ps.

Original languageEnglish
Article number111802
JournalPhysical Review Letters
Volume112
Issue number11
DOIs
Publication statusPublished - 19 Mar 2014
Externally publishedYes

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