First observation and branching fraction measurement of the Λ b 0 → D s − p $$ {\Lambda}_b^0\to {D}_s^{-}p $$ decay
Author(s)
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Afsharnia, H.; Agapopoulou, C.; Aidala, C. A.; Ajaltouni, Z.; Akar, S.; Akiba, K.; Albicocco, P.; Albrecht, J.; ... Show more Show less
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Abstract
The first observation of the
Λ
b
0
→
D
s
−
p
$$ {\Lambda}_b^0\to {D}_s^{-}p $$
decay is presented using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of
s
$$ \sqrt{s} $$
= 13 TeV, corresponding to a total integrated luminosity of 6 fb−1. Using the
Λ
b
0
→
Λ
c
+
π
−
$$ {\Lambda}_b^0\to {\Lambda}_c^{+}{\pi}^{-} $$
decay as the normalisation mode, the branching fraction of the
Λ
b
0
→
D
s
−
p
$$ {\Lambda}_b^0\to {D}_s^{-}p $$
decay is measured to be
B
Λ
b
0
→
D
s
−
p
=
12.6
±
0.5
±
0.3
±
1.2
×
10
−
6
$$ \mathcal{B}\left({\Lambda}_b^0\to {D}_s^{-}p\right)=\left(12.6\pm 0.5\pm 0.3\pm 1.2\right)\times {10}^{-6} $$
, where the first uncertainty is statistical, the second systematic and the third due to uncertainties in the branching fractions of the
Λ
b
0
→
Λ
c
+
π
−
$$ {\Lambda}_b^0\to {\Lambda}_c^{+}{\pi}^{-} $$
,
D
s
−
→
K
−
K
+
π
−
$$ {D}_s^{-}\to {K}^{-}{K}^{+}{\pi}^{-} $$
and
Λ
c
+
→
p
K
−
π
+
$$ {\Lambda}_c^{+}\to p{K}^{-}{\pi}^{+} $$
decays.
Date issued
2023-07-10Department
Massachusetts Institute of Technology. Department of PhysicsPublisher
Springer Berlin Heidelberg
Citation
Journal of High Energy Physics. 2023 Jul 10;2023(7):75
Version: Final published version