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
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1.71 MB
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Author(s)
The LHCb Collaboration
Boettcher, Thomas Julian
Craik, Daniel C
Weisser, Constantin
Williams, Michael
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/JHEP03(2019)176
