Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2011-06-22
Physics
High Energy Physics
High Energy Physics - Experiment
Submitted to PRL (7 pages, 2 Figures, 1 Table); Physical Review Letters, Vol.107, No.21, 2011
Scientific paper
10.1103/PhysRevLett.107.211801
The relative abundance of the three decay modes $B_d \to D^- K^+$, $B_d \to D^- \pi^+$ and $B_s \to D_s^- \pi^+$ produced in 7 TeV $pp$ collisions at the LHC is determined from data corresponding to an integrated luminosity of 35 pb$^{-1}$. The branching fraction of $B_d \to D^- K^+$ is found to be $\cal B (B_d \to D^- K^+) = (2.01 \pm 0.18^{\textrm{stat}} \pm 0.14^{\textrm{syst}})\times 10^{-4}$. The ratio of fragmentation fractions \fsfdt is determined through the relative abundance of $B_s \to D_s^- \pi^+$ to $B_d \to D^- K^+$ and $B_d \to D^-\pi^+$, leading to $f_s/f_d = 0.253 \pm 0.017 \pm 0.017 \pm 0.020$, where the uncertainties are statistical, systematic, and theoretical respectively.
Aaij R.
Adeva B.
Adinolfi M.
Adrover C.
Affolder A.
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