Study of the $B_c^+ \to J/\psi D_s^+$ and $B_c^+ \to J/\psi D_s^{*+}$ decays with the ATLAS detector
- Aad, Georges et al
- arXiv:1507.07099CERN-PH-EP-2015-163
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| Feynman diagrams for $\Bc\to\Jpsi\DsOrStar$ decays: \protect\subref{fig:Diagrams:Diag_spectator} colour-favoured spectator, \protect\subref{fig:Diagrams:Diag_spectator_colsup} colour-suppressed spectator, and \protect\subref{fig:Diagrams:Diag_annihil} annihilation topology. |
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| The mass distribution for the selected $\Jpsi\Ds$ candidates. The red solid line represents the projection of the fit to the model described in the text. The contribution of the $\Bc\to\Jpsi\Ds$ decay is shown with the magenta long-dashed line; the brown dash-dot and green dotted lines show the $\Bc\to\Jpsi\DsStar$ $A_{00}$ and $A_{\pm\pm}$ component contributions, respectively; the blue dashed line shows the background model. The uncertainties of the listed fit result values are statistical only. |
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| The mass distribution for the selected $\Bc\to\Jpsi\pi^+$ candidates. The red solid line represents the result of the fit to the model described in the text. The brown dotted and blue dashed lines show the signal and background component projections, respectively. The uncertainty of the shown signal yield is statistical only. |
| Comparison of the results of this measurement with those of LHCb~\cite{Aaij:2013gia} and theoretical predictions based on a QCD relativistic potential model~\cite{Colangelo:1999zn}, QCD sum rules~\cite{Kiselev:2002vz}, relativistic constituent quark model (RCQM)~\cite{Ivanov:2006ni}, BSW relativistic quark model (with fixed average transverse quark momentum $\omega=0.40\GeV$)~\cite{Dhir:2008hh}, light-front quark model (LFQM)~\cite{Ke:2013yka}, perturbative QCD (pQCD)~\cite{Rui:2014tpa}, and relativistic independent quark model (RIQM)~\cite{Kar:2013fna}. The uncertainties of the theoretical predictions are shown if they are explicitly quoted in the corresponding papers. Statistical and systematic uncertainties added in quadrature are quoted for the results of ATLAS and LHCb. |