Abstract
We measure the branching fractions for seven $$ {D}_s^{+} $$
D
s
+
two-body decays to pseudo-scalar mesons, by analyzing data collected at $$ \sqrt{s} $$
s
= 4.178 ∼ 4.226 GeV with the BESIII detector at the BEPCII collider. The branching fractions are determined to be$$ {\displaystyle \begin{array}{c}\mathcal{B}\left({D}_s^{+}\to {K}^{+}\eta \hbox{'}\right)=\left(2.68\pm 0.17\pm 0.17\pm 0.08\right)\times {10}^{-3},\\ {}\mathcal{B}\left({D}_s^{+}\to \eta \hbox{'}{\pi}^{+}\right)=\left(37.8\pm 0.4\pm 2.1\pm 1.2\right)\times {10}^{-3},\\ {}\mathcal{B}\left({D}_s^{+}\to {K}^{+}\eta \right)=\left(1.62\pm 0.10\pm 0.03\pm 0.05\right)\times {10}^{-3},\\ {}\mathcal{B}\left({D}_s^{+}\to \eta {\pi}^{+}\right)=\left(17.41\pm 0.18\pm 0.27\pm 0.54\right)\times {10}^{-3},\\ {}\mathcal{B}\left({D}_s^{+}\to {K}^{+}{K}_S^0\right)=\left(15.02\pm 0.10\pm 0.27\pm 0.47\right)\times {10}^{-3},\\ {}\mathcal{B}\left({D}_s^{+}\to {K}_S^0{\pi}^{+}\right)=\left(1.109\pm 0.034\pm 0.023\pm 0.035\right)\times {10}^{-3},\\ {}\mathcal{B}\left({D}_s^{+}\to {K}^{+}{\pi}^0\right)=\left(0.748\pm 0.049\pm 0.018\pm 0.035\right)\times {10}^{-3},\end{array}} $$
B
D
s
+
→
K
+
η
'
=
2.68
±
0.17
±
0.17
±
0.08
×
10
−
3
,
B
D
s
+
→
η
'
π
+
=
37.8
±
0.4
±
2.1
±
1.2
×
10
−
3
,
B
D
s
+
→
K
+
η
=
1.62
±
0.10
±
0.03
±
0.05
×
10
−
3
,
B
D
s
+
→
η
π
+
=
17.41
±
0.18
±
0.27
±
0.54
×
10
−
3
,
B
D
s
+
→
K
+
K
S
0
=
15.02
±
0.10
±
0.27
±
0.47
×
10
−
3
,
B
D
s
+
→
K
S
0
π
+
=
1.109
±
0.034
±
0.023
±
0.035
×
10
−
3
,
B
D
s
+
→
K
+
π
0
=
0.748
±
0.049
±
0.018
±
0.035
×
10
−
3
,
where the first uncertainties are statistical, the second are systematic, and the third are from external input branching fraction of the normalization mode $$ {D}_s^{+} $$
D
s
+
→ K+K−π+. Precision of our measurements is significantly improved compared with that of the current world average values.
Measurements of absolute branching fractions for
D
mesons decays into two pseudoscalar mesons