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Observation of the decay Bc+→Bs 0π+

  • R. Aaij
  • , 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
  • , S. Amerio
  • , Y. Amhis
  • , L. Anderlini
  • , J. Anderson
  • , R. Andreassen
  • , J. E. Andrews
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Research output: Contribution to journalArticlepeer-review

96 Citations (Scopus)

Abstract

The result of a search for the decay Bc+→Bs0π+ is presented, using the Bs0→Ds-π+ and Bs0→J/ψ channels. The analysis is based on a data sample of pp collisions collected with the LHCb detector, corresponding to an integrated luminosity of 1 fb-1 taken at a center-of-mass energy of 7 TeV, and 2 fb-1 taken at 8 TeV. The decay Bc+→Bs0π+ is observed with significance in excess of 5 standard deviations independently in both decay channels. The measured product of the ratio of cross sections and branching fraction is [σ(Bc+)/ σ(Bs0)]×B(Bc+→Bs0π+)=[2.37±0.31 (stat)±0.11 (syst)-0.13+0.17(τBc+)]×10-3, in the pseudorapidity range 2<η(B)<5, where the first uncertainty is statistical, the second is systematic, and the third is due to the uncertainty on the Bc+ lifetime. This is the first observation of a B meson decaying to another B meson via the weak interaction.

Original languageEnglish
Article number181801
JournalPhysical Review Letters
Volume111
Issue number18
DOIs
Publication statusPublished - 1 Nov 2013
Externally publishedYes

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