Resumen
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.
Idioma original | English |
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Páginas (desde-hasta) | 484-494 |
Número de páginas | 11 |
Publicación | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volumen | 747 |
DOI | |
Estado | Published - 1 jul. 2015 |
Publicado de forma externa | Sí |
All Science Journal Classification (ASJC) codes
- Física nuclear y de alta energía