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Measurement of the branching fractions of the decays D+ → K−K+K+, D+ → π−π+K+ and D s + → π−K+K+
Name
Aaij2019_Article_MeasurementOfTheBranchingFract.pdf
Description
Published version
Size
1.71 MB
Format
Adobe PDF
Checksum (MD5)
55d7e9af7d1af8c5eed80c229beb5479
Date Issued
2019
Journal
Journal of High Energy Physics
Publisher
Springer Science and Business Media LLC
Version
Final published version
Abstract
The branching fractions of the doubly Cabibbo-suppressed decays
$D^+\rightarrow K^-K^+K^+$, $D^+\rightarrow \pi^-\pi^+K^+$ and
$D^+_s\rightarrow\pi^-K^+K^+$ are measured using the decays $D^+\rightarrow
K^-\pi^+\pi^+$ and $D^+_s\rightarrow K^-K^+\pi^+$ as normalisation channels.
The measurements are performed using proton-proton collision data collected
with the LHCb detector at a centre-of-mass energy of 8 TeV, corresponding to an
integrated luminosity of 2.0 fb$^{-1}$. The results are
\begin{align}
\frac {\mathcal{B}(D^+\rightarrow K^-K^+K^+)} {\mathcal{B}(D^+\rightarrow
K^-\pi^+\pi^+)}& = (6.541 \pm 0.025 \pm 0.042) \times 10^{-4},\nonumber
\frac {\mathcal{B}(D^+\rightarrow \pi^-\pi^+K^+)} {\mathcal{B}(D^+\rightarrow
K^-\pi^+\pi^+)}& = (5.231 \pm 0.009 \pm 0.023) \times 10^{-3}, \nonumber
\frac {\mathcal{B}(D^+_s\rightarrow\pi^-K^+K^+)}
{\mathcal{B}(D^+_s\rightarrow K^-K^+\pi^+)}& = (2.372 \pm 0.024 \pm 0.025)
\times 10^{-3},\nonumber
\end{align} where the uncertainties are statistical and systematic,
respectively. These are the most precise measurements up to date.
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Creative Commons Attribution 4.0 International license
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DOI of Published Version
10.1007/JHEP03(2019)176
