Observation of the decay B-<sup>0</sup><inf>s</inf>→ ψ(2S)K<sup>+</sup>π<sup>-</sup>
- R. Aaij,
- B. Adeva,
- M. Adinolfi,
- A. Affolder,
- Z. Ajaltouni,
- S. Akar
- National Institute for Subatomic Physics,
- University of Santiago de Compostela,
- University of Bristol,
- University of Liverpool,
- Université Clermont Auvergne,
- CNRS
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Abstract
The decay B- 0 s→ ψ(2S)K +π -is observed using a data set corresponding to an integrated luminosity of 3.0fb -1collected by the LHCb experiment in pp collisions at centre-of-mass energies of 7 and 8 TeV. The branching fraction relative to the B 0→ ψ(2S)K +π -decay mode is measured to be, where fs/fd indicates the uncertainty due to the ratio of probabilities for a b quark to hadronise into a B 0 sor B 0meson. Using an amplitude analysis, the fraction of decays proceeding via an intermediate K*(892) 0meson is measured to be 0.645±0.049(stat)±0.049(syst) and its longitudinal polarisation fraction is 0.524±0.056(stat)±0.029(syst). The relative branching fraction for this component is determined to be. In addition, the mass splitting between the B 0 sand B 0mesons is measured as M(B 0 s)-M(B 0)=87.45±0.44(stat)±0.09(syst)MeV/c 2.
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Original language
EnglishPages from-to (Number of pages)
Pages 484-494 (11 pages)Journal (Volume, Issue Number)
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics (Volume 747)Publication milestones
- Published - 01/07/2015
Publication status
ISSN
0370-2693Publication IDs
- Scopus: 84935030346
- WOS: 000358624800078