First observation of the decay $D^{0}\rightarrow K^{-}\pi^{+}\mu^{+}\mu^{-}$ in the $\rho^{0}$-$\omega$ region of the dimuon mass spectrum
- Aaij, Roel et al
- arXiv:1510.08367LHCB-PAPER-2015-043CERN-PH-EP-2015-283
| \small Summary of the results of the fit described in Sect.~\ref{sec:fitter}. The yields measured in the \signal sample and the correlations between them, the yields measured in the normalisation sample, the common width fitted to the \signal and \norm yields, and the relative uncertainty on \mbox{\BF(\signal)} are presented. Uncertainties on the fitted parameters are statistical. The variation of the uncertainty on \mbox{\BF(\signal)} when the background yields are fixed indicates to what extent it is enhanced by the need to separate contributions in overlap and which shapes present some similarities. |
| \small Mass distributions of (a) \norm and (b) \signal candidates. The data are shown as points (black) and the total PDF (blue solid line) is overlaid. In (a), the two corresponding components of the fit model are the \norm decays (red solid line) and the non-peaking background (violet dashed line). In (b), the components are the \signal (long-dashed green line), the peaking background due to misidentified \norm decays (red solid line), and the non-peaking background (violet dashed line). |
| \small Distributions of the BDT response of \signal ( circles) and \norm decays (triangles) in data (full markers) and simulation (open markers). In data, the background contributions are removed using the {\it sPlot} technique. The lower plot shows the ratio between the \signal and \norm distributions in data (full squares) and simulation (open squares). |
| \small Background subtracted distribution of (a) the \Km\pip invariant mass and (b) the \mup\mun invariant mass, measured in \signal decays using the {\it sPlot} technique. |
| \small Background subtracted distribution of (a) the \Km\pip invariant mass and (b) the \mup\mun invariant mass, measured in \signal decays using the {\it sPlot} technique. |