The first observation of the decay B̄ s 0→D 0K ×0 using pp data collected by the LHCb detector at a centre-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 36 pb -1, is reported. A signal of 34.4±6.8 events is obtained and the absence of signal is rejected with a statistical significance of more than nine standard deviations. The B̄ s 0→D 0K ×0 branching fraction is measured relative to that of B̄0→D 0 ρ 0: B(B̄ s 0→D 0K ×0) B(B̄ 0→D 0ρ 0)=1.48±0 .34±0.15±0.12, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the ratio of the B 0 and Bs0 hadronisation fractions.
|Número de páginas||8|
|Publicación||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Estado||Published - 30 nov 2011|
|Publicado de forma externa||Sí|
All Science Journal Classification (ASJC) codes
- Física nuclear y de alta energía