Measurement of production cross sections times branching fraction of $B_c^+ \rightarrow J/\psi \pi^+$ and $B^+\rightarrow J/\psi K^+$ in pp collisions at $\sqrt{s}=7~\mathrm{TeV}$ at CMS

Measurements of the differential production cross section times branching fraction of the $B_c^+ \rightarrow J/\psi \pi^+$ and $B^+\rightarrow J/\psi K^+$ processes are presented as a function of the $B_c^+$($B^+$) transverse momentum $p_{T}$ and absolute rapidity $|y|$. The measurements are based on data collected by CMS in $2011$ in pp collisions at $\sqrt{s}=7~\mathrm{TeV}$, corresponding to an integrated luminosity of $4.77~\mathrm{fb^{-1}}$. The integrated production cross sections times branching fraction in the kinematic region of $p_{T}(B_c^+,~B^+)>10~\mathrm{GeV}/c$ and $|y|(B_c^+,~B^+)<1.5$ are measured to be $40.8\pm4.7{\rm~(stat.)}\pm2.8{\rm~(syst.)}~\mathrm{pb}$ for $B_c^+ \rightarrow J/\psi \pi^+$ and $5851.3\pm37.1\pm{\rm~(stat.)}\pm446.4{\rm~(syst.)}~\mathrm{pb}$ for $B^+\rightarrow J/\psi K^+$. The $B^+\rightarrow J/\psi K^+$ production is found to be described reasonably well by FONLL theoretical calculations, while the shape of $B_c^+ \rightarrow J/\psi \pi^+$ production is described well by BCVEGPY theoretical predictions.