Resumen
The first observation of the decay B0→D ̄0K +K - is reported from an analysis of 0.62fb -1 of pp collision data collected with the LHCb detector. Its branching fraction is measured relative to that of the topologically similar decay B0→D ̄0π +π - to be B(B0→D ̄0K +K -)B(B0→D ̄0π +π -)=0.056±0.011±0.007,where the first uncertainty is statistical and the second is systematic. The significance of the signal is 5.8σ. Evidence, with 3.8σ significance, for Bs0→D ̄0K +K - decays is also presented. The relative branching fraction is measured to be B(Bs0→D ̄0K +K -)B(B0→D ̄0K +K -)=0.90±0.27±0.20. These channels are of interest to study the mechanisms behind hadronic B decays, and open new possibilities for CP violation analyses with larger data sets.
Idioma original | English |
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Número de artículo | 131801 |
Publicación | Physical Review Letters |
Volumen | 109 |
N.º | 13 |
DOI | |
Estado | Published - 26 sept. 2012 |
Publicado de forma externa | Sí |
All Science Journal Classification (ASJC) codes
- Física y astronomía (todo)