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Relative branching ratio measurements of charmless $B^{\pm}$ decays to three hadrons

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Abstract

With an integrated luminosity of 34 pb$^{-1}$ collected by LHCb during the 2010 run, we analyse the charmless three-body $B^{\pm}$ decays $B^{\pm} \rightarrow K^{\pm} \pi^{+} \pi^{-}$, $B^{\pm} \rightarrow K^{\pm} K^{+} K^{-}$ and $B^{\pm} \rightarrow p \bar p K^{\pm}$. The branching ratios relative to $B^{\pm} \rightarrow K^{\pm} \pi^{+} \pi^{-}$ are found to be $\frac{{\cal B}(B^{\pm}\rightarrow K^{\pm}K^{+}K^{-})}{{\cal B}(B^{\pm}\rightarrow K^{\pm}\pi^{+}\pi^{-})} = 0.52 \pm 0.03 {\mathrm{(stat)}} \pm 0.01 {\mathrm{(syst)}}$ and $\frac{{\cal B}(B^{\pm}\rightarrow p \bar p K^{\pm})}{{\cal B}(B^{\pm}\rightarrow K^{\pm}\pi^{+}\pi^{-})} = 0.19 \pm 0.02 {\mathrm{(stat)}} \pm 0.02 {\mathrm{(syst)}}$.

Figures and captions

Fit to the invariant mass of $B^{\pm} \rightarrow K^{\pm} \pi^{+} \pi^{-}$, with contributions from the $B^{\pm} \rightarrow K^{\pm} \pi^{+} \pi^{-}$ signal (red), $B^{\pm} \rightarrow \bar D^0 (D^{0})\pi^{\pm}$ with $\bar D^0 (D^{0})\rightarrow K^{\pm}\pi^{\mp}\pi^{0}$ (blue), $B^{\pm} \rightarrow \eta' K^{\pm}$ with $ \eta' \rightarrow \rho^{0} \gamma $ and $ \rho^{0}\rightarrow \pi^{+} \pi^{-}$ (green), $ B^{\pm} \rightarrow K^{*\pm} \pi^+ \pi^-$ with $ K^{*\pm} \rightarrow K^{\pm} \pi^{0}$ (grey), mis-identification of $ B^{\pm} \rightarrow \pi^{\pm} \pi^+ \pi^-$ (magenta), and combinatorial background (yellow).

fit_kp[..].pdf [31 KiB]
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fit_kpipi_26.pdf

Fit to the invariant mass of $B^{\pm} \rightarrow K^{\pm} K^{+} K^{-}$, with contributions from the $B^{\pm} \rightarrow K^{\pm} K^{+} K^{-}$ signal (red), $B^{\pm}\rightarrow {K^{*\pm}K^{+}K^{-}}$ with $K^{*\pm}\rightarrow K^{+}\pi^{0}$ (blue), and combinatorial background (yellow).

fit_kkk_26.pdf [20 KiB]
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fit_kkk_26.pdf

Fit to the invariant mass of $B^{\pm} \rightarrow p \bar p K^{\pm}$. The red line shows the $B^{\pm} \rightarrow p \bar p K^{\pm}$ signal, and the yellow line shows the combinatorial background.

fit_ppk_26.pdf [19 KiB]
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fit_ppk_26.pdf

Animated gif made out of all figures.

CONF-2011-059.gif
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thumbnail_CONF-2011-059.gif

Tables and captions

Selection criteria for $B^{\pm}$ decays to three charmless hadrons.

Table_1.pdf [67 KiB]
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tex code
Table_1.pdf

Parameters of the $B^{\pm}$ mass fits.

Table_2.pdf [46 KiB]
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Table_2.pdf

Summary of the measurements used to estimate the relative branching ratios. The uncertainties are statistical.

Table_3.pdf [54 KiB]
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Table_3.pdf

Absolute systematic uncertainties of the branching ratio measurements.

Table_4.pdf [38 KiB]
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Table_4.pdf

Created on 09 December 2018.Citation count from INSPIRE on 09 December 2018.