Branching ratio measurements of exclusive B+ decays to charmonium with the Collider Detector at Fermilab

Le résumé fourni par la source

We report on measurements of the branching ratios of the decays ${B}^{+}\ensuremath{\rightarrow}{\ensuremath{\chi}}_{c1}^{0}{(1P)K}^{+}$ and ${B}^{+}\ensuremath{\rightarrow}J/\ensuremath{\psi}{K}^{+}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}},$ where ${\ensuremath{\chi}}_{c1}^{0}(1P)\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\gamma}$ and $J/\stackrel{\ensuremath{\rightarrow}}{\ensuremath{\psi}}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ in $p\overline{p}$ collisions at $\sqrt{s}=1.8\mathrm{TeV}.$ Using a data sample from an integrated luminosity of $110{\mathrm{pb}}^{\ensuremath{-}1}$ collected by the Collider Detector at Fermilab we measure the branching ratios to be ${BR(B}^{+}\ensuremath{\rightarrow}{\ensuremath{\chi}}_{c1}^{0}{(1P)K}^{+})=15.5\ifmmode\pm\else\textpm\fi{}5.4(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}1.5(\mathrm{syst})\ifmmode\pm\else\textpm\fi{}1.3(\mathrm{br})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ and ${BR(B}^{+}\ensuremath{\rightarrow}J/\ensuremath{\psi}{K}^{+}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}})=6.9\ifmmode\pm\else\textpm\fi{}1.8(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}1.1(\mathrm{syst})\ifmmode\pm\else\textpm\fi{}0.4(\mathrm{br})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ where $(\mathrm{br})$ is due to the finite precision on ${BR(B}^{+}\ensuremath{\rightarrow}J/\ensuremath{\psi}{K}^{+}),$ $BR({\ensuremath{\chi}}_{c1}^{0}(1P)\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\gamma})$ is used to normalize the signal yield, and $(\mathrm{syst})$ encompasses all other systematic uncertainties.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.