First observation and branching fraction measurement of the Λ b 0 → D s − p $$ {\Lambda}_b^0\to {D}_s^{-}p $$ decay
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13130_2023_Article_21287.pdf
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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.
Date Issued
July 10, 2023
Publisher
Springer Berlin Heidelberg
Citation
Journal of High Energy Physics. 2023 Jul 10;2023(7):75
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1007/JHEP07(2023)075
