Invariant-mass distributions of the (a) $ K ^{*0}$ and (b) $\phi$ resonance candidates. The black points represent the data and the fit result is represented as a solid blue line. The fit is described in the text. The regions outside the vector meson invariant-mass window are shaded. The Poisson $\chi^2$ residuals [28] are shown below the fits with the $\pm2 \sigma$ confidence-level interval delimited by solid red lines.

Invariant-mass distributions of the (a) $ B ^0 \rightarrow K ^{*0} \gamma $ and (b) $ B ^0_ s \rightarrow \phi \gamma $ candidates. The black points represent the data and the fit result is represented as a solid blue line. The signal is fitted with a double-sided Crystal Ball function (short-dashed green line). The combinatorial background is modelled with an exponential function (long-dashed red line). In decreasing amplitude order, the exclusive background contributions to $ B ^0 \rightarrow K ^{*0} \gamma $ are $ B^{+(0)} \rightarrow K^{*0}\pi^{+(0)}\gamma$ (short-dotted black), $B\rightarrow K^{*0}(\phi)\pi^0X$ (long-dashed blue), $ B ^0_ s \rightarrow K^{*0}\gamma$ (dotted short-dashed green), $\Lambda ^0_ b \rightarrow \Lambda ^*\gamma$ (double-dotted dashed pink), $ B ^0 \rightarrow K^+\pi^-\pi^0$ (dotted long-dashed black) and $ B ^0_ s \rightarrow K^+\pi^-\pi^0$ (long-dotted blue). The background contributions to $ B ^0_ s \rightarrow \phi \gamma $ are $ B^{+(0)} \rightarrow \phi K^{+(0)}\gamma$ (dotted black), $\Lambda ^0_ b \rightarrow \Lambda ^*\gamma$ (double-dotted dashed pink) and $ B ^0_ s \rightarrow K^+K^-\pi^0$ (dotted-dashed black). No significant contribution to $ B ^0_ s \rightarrow \phi \gamma $ is found from partially reconstructed $B\rightarrow K^{*0}(\phi)\pi^0X$ decays. The Poisson $\chi^2$ residuals [28] are shown below the fit with the $\pm 2 \sigma$ confidence-level interval delimited by solid red lines.

Invariant-mass distributions of the (a) $\overline{ B }{} ^0$ $\rightarrow$ $\overline{ K }{} ^{*0}$ $\gamma $ and (b) $ B ^0 \rightarrow K ^{*0} \gamma $ decay candidates. The black points represent the data and the fit result is represented as a solid blue line. The different background components are also shown. The Poisson $\chi^2$ residuals [28] are shown below the fits with the $\pm2 \sigma$ confidence-level interval delimited by solid red lines.

Animated gif made out of all figures.

Expected contributions to the $ B ^0 \rightarrow K ^{*0} \gamma $ and $ B ^0_ s \rightarrow \phi \gamma $ yields in the $\pm$1 $ {\mathrm{ Ge V /}c^2}$ mass window from the exclusive background channels: radiative decays, $h^+h'^-\gamma$ (top), charmless b decays involving energetic $\pi^0$, $h^+h'^-\pi^0$ (middle) and partially reconstructed decays (bottom). The average measurement (exp.) or theoretical (theo.) branching fraction is given where available. Each exclusive contribution above 0.1% is included in the fit model, with a fixed shape determined from simulation. The amplitude of the partially reconstructed backgrounds is left to vary in the fit while the $h^+h'^-\gamma$ and $h^+h'^-\pi^0$ contributions are fixed to their expected level.

Summary of the individual contributions to the relative systematic uncertainty on the ratio of branching fractions as defined in Eq. ???.

$ C P$ asymmetry and total number of signal candidates measured for each magnet polarity.

Corrections to the raw asymmetry and corresponding systematic uncertainties.

Supplementary material full pdf

This ZIP file contains supplemetary material for the publication LHCb-PAPER-2012-019. The files are: supplementary.pdf : An overview of the extra figures *.pdf, *.png, *.eps : The figures in variuous formats