Measurement of the branching fraction of the $${{B} ^0} {\rightarrow }{{D} ^+_{s}} {{\pi } ^-} $$ B 0 → D s + π - decay
Name
10052_2020_Article_8790.pdf
Size
1.52 MB
Format
Adobe PDF
Checksum (MD5)
821dbf2ad186d2a8bf0583a0ad70adad
Author(s)
Aaij, R.
Beteta, C. A
Ackernley, T.
Adeva, B.
Adinolfi, M.
Afsharnia, H.
Aidala, C. A
Aiola, S.
Ajaltouni, Z.
Akar, S.
Date Issued
April 12, 2021
Publisher
Springer Berlin Heidelberg
Citation
The European Physical Journal C. 2021 Apr 12;81(4):314
Version
Final published version
Abstract
Abstract
A branching fraction measurement of the
$${{B} ^0} {\rightarrow }{{D} ^+_{s}} {{\pi } ^-} $$
B
0
→
D
s
+
π
-
decay is presented using proton–proton collision data collected with the LHCb experiment, corresponding to an integrated luminosity of
$$5.0\,\text {fb} ^{-1} $$
5.0
fb
-
1
. The branching fraction is found to be
$${\mathcal {B}} ({{B} ^0} {\rightarrow }{{D} ^+_{s}} {{\pi } ^-} ) =(19.4 \pm $$
B
(
B
0
→
D
s
+
π
-
)
=
(
19.4
±
$$1.8\pm 1.3 \pm 1.2)\times 10^{-6}$$
1.8
±
1.3
±
1.2
)
×
10
-
6
, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the
$${{B} ^0} {\rightarrow }{{D} ^-} {{\pi } ^+} $$
B
0
→
D
-
π
+
,
$${{D} ^+_{s}} {\rightarrow }{{K} ^+} {{K} ^-} {{\pi } ^+} $$
D
s
+
→
K
+
K
-
π
+
and
$${{D} ^-} {\rightarrow }{{K} ^+} {{\pi } ^-} {{\pi } ^-} $$
D
-
→
K
+
π
-
π
-
branching fractions. This is the most precise single measurement of this quantity to date. As this decay proceeds through a single amplitude involving a
$$b{\rightarrow }u$$
b
→
u
charged-current transition, the result provides information on non-factorisable strong interaction effects and the magnitude of the Cabibbo–Kobayashi–Maskawa matrix element
$$V_{ub}$$
V
ub
. Additionally, the collision energy dependence of the hadronisation-fraction ratio
$$f_s/f_d$$
f
s
/
f
d
is measured through
$${{\overline{B}} {}^0_{s}} {\rightarrow }{{D} ^+_{s}} {{\pi } ^-} $$
B
¯
s
0
→
D
s
+
π
-
and
$${{B} ^0} {\rightarrow }{{D} ^-} {{\pi } ^+} $$
B
0
→
D
-
π
+
decays.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1140/epjc/s10052-020-08790-2
