- First observation of the decay $\bar{B}^0_s \to D^0 K^{*0}$ and a measurement of the ratio of branching fractions $\frac{{\cal B}(\bar{B}^0_s \to D^0 K^{*0})}{{\cal B}(\bar{B}^0 \to D^0 \rho^0)}$ doi link

Auteur(s): Aaij R., Ben-Haim E., Benayoun M., David P., Del Buono L., Bonis De, Decamp D., Ghez Ph., Hopchev P., Lees J.-P., Machikhiliyan I.V., Minard M.-N., Pietrzyk B., T'Jampens S., Tisserand V., Arrabito L., Ajaltouni Ziad, Deschamps O., Henrard Pierre, Jahjah-Hussein Marwa, Lefèvre R., Li Gioi L., Monteil S., Niess V., Perret Pascal, Roa Romero Diego Alejandro, Sobczak Krzysztof Grzegorz, Barsuk S., Callot O., D'Almagne B.

(Article) Publié: Physics Letters B, vol. 706 p.32-39 (2011)

Ref HAL: in2p3-00637871_v1
Ref Arxiv: 1110.3676
DOI: 10.1016/j.physletb.2011.10.073
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
16 citations

The first observation of the decay $\bar{B}^0_s \to D^0 K^{*0}$ 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 $34.4 \pm 6.8$ events is obtained and the absence of signal is rejected with a statistical significance of more than nine standard deviations. The $\bar{B}^0_s \to D^0 K^{*0}$ branching fraction is measured relative to that of $\bar{B}^0 \to D^0 \rho^0$: $\frac{{\cal B}(\bar{B}^0_s \to D^0 K^{*0})}{{\cal B}(\bar{B}^0 \to D^0 \rho^0)} = 1.48 \pm 0.34 \pm 0.15 \pm 0.12$, 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 $B^0_s$ hadronisation fractions.

Commentaires: 10 pages, 3 figures, submitted to Phys. Lett. B (See paper for full list of authors)