A search for decays of $B_c^+$ mesons to two charm mesons is performed for the first time using data corresponding to an integrated luminosity of 3.0 fb$^{-1}$, collected by the LHCb experiment in $pp$ collisions at centre-of-mass energies of 7 and 8 TeV. The decays considered are $B_c^+\to D^{(*)+}_{(s)} \overline{D}^{(*)0}$ and $B_c^+\to D^{(*)+}_{(s)} D^{(*)0}$, which are normalised to high-yield $B^+\to D^+_{(s)} \overline{D}^0$ decays. No evidence for a signal is found and limits are set on twelve $B_c^+$ decay modes.
Estimates of the branching fractions of four $ B _ c ^+ \rightarrow D ^+_{( s )} \optbar{ D}{} ^0 $ decays in units of $10^{-6}$. Decays of the $ B _ c ^+$ meson to final states with one or two excited charm mesons have similar branching fractions and can be found in the cited references. |
Table_1.pdf [66 KiB] HiDef png [53 KiB] Thumbnail [27 KiB] tex code |
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Ratio $\varepsilon_{ B _ c ^+ }/\varepsilon_{ B ^+ }$ of total efficiencies of $ B _ c ^+$ decays relative to the corresponding fully reconstructed $ B ^+ $ decays. The quoted uncertainties are statistical only. |
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Signal yields from the fits of $ B \rightarrow D ^+_{( s )} \optbar{ D}{} ^0 $ decays. Samples with $ D ^0 \rightarrow K ^- \pi ^+ $ and $ D ^0 \rightarrow K ^- \pi ^+ \pi ^- \pi ^+ $ are fitted simultaneously. The uncertainties are statistical only. |
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Systematic uncertainties on the $ B _ c ^+$ yields, for the combined fit to both the $ D ^0 \rightarrow K ^- \pi ^+ $ and the $ D ^0 \rightarrow K ^- \pi ^+ \pi ^- \pi ^+ $ decay channels. The total systematic uncertainty is calculated as the quadratic sum of the individual components. |
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Systematic uncertainties, in %, on the normalisation of the $ B _ c ^+$ branching fraction determination. The total systematic uncertainty is calculated as the quadratic sum of the individual components. |
Table_5.pdf [70 KiB] HiDef png [75 KiB] Thumbnail [30 KiB] tex code |
Created on 02 May 2024.