Measurement of the branching fractions of the decays D+ → K−K+K+, D+ → π−π+K+ and D s + → π−K+K+
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13130_2019_Article_10257.pdf
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Author(s)
Aaij, R.
Abellán Beteta, C.
Adeva, B.
Adinolfi, M.
Aidala, C. A
Ajaltouni, Z.
Akar, S.
Albicocco, P.
Albrecht, J.
Alessio, F.
Date Issued
March 27, 2019
Publisher
Springer Berlin Heidelberg
Citation
Journal of High Energy Physics. 2019 Mar 27;2019(3):176
Version
Final published version
Abstract
Abstract
The branching fractions of the doubly Cabibbo-suppressed decays D+ → K−K+K+, D+ → π−π+K+ and D
s
+
→ π−K+K+ are measured using the decays D+ → K−π+π+ and D
s
+
→ K−K+π+ 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
ℬ
D
+
→
K
−
K
+
K
+
ℬ
D
+
→
K
−
π
+
π
+
=
6.541
±
0.025
±
0.042
×
10
−
4
,
ℬ
D
+
→
π
−
π
+
K
+
ℬ
D
+
→
K
−
π
+
π
+
=
5.231
±
0.009
±
0.023
×
10
−
3
,
ℬ
D
s
+
→
π
−
K
+
K
+
ℬ
D
s
+
→
K
−
K
+
π
+
,
=
2.372
±
0.024
±
0.025
×
10
−
3
,
$$ \begin{array}{c}\hfill \frac{\mathrm{\mathcal{B}}\left({D}^{+}\to {K}^{-}{K}^{+}{K}^{+}\right)}{\mathrm{\mathcal{B}}\left({D}^{+}\to {K}^{-}{\pi}^{+}{\pi}^{+}\right)} = \left(6.541\pm 0.025\pm 0.042\right)\times {10}^{-4},\hfill \\ {}\hfill \frac{\mathrm{\mathcal{B}}\left({D}^{+}\to\ {\pi}^{-}{\pi}^{+}{K}^{+}\right)}{\mathrm{\mathcal{B}}\left({D}^{+}\to {K}^{-}{\pi}^{+}{\pi}^{+}\right)}=\left(5.231\pm 0.009\pm 0.023\right)\times {10}^{-3},\hfill \\ {}\hfill \frac{\mathrm{\mathcal{B}}\left({D}_s^{+}\to\ {\pi}^{-}{K}^{+}{K}^{+}\right)}{\mathrm{\mathcal{B}}\left({D}_s^{+}\to {K}^{-}{K}^{+}{\pi}^{+}\right), } = \left(2.372\pm 0.024\pm 0.025\right)\times {10}^{-3},\hfill \end{array} $$
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
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Creative Commons Attribution 4.0 International license
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DOI of Published Version
https://doi.org/10.1007/JHEP03(2019)176
