In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2023, No. 7 ( 2023-07-10)
Abstract:
The first observation of the $$ {\Lambda}_b^0\to {D}_s^{-}p $$ Λ b 0 → D s − p decay is presented using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of $$ \sqrt{s} $$ s = 13 TeV, corresponding to a total integrated luminosity of 6 fb − 1 . Using the $$ {\Lambda}_b^0\to {\Lambda}_c^{+}{\pi}^{-} $$ Λ b 0 → Λ c + π − decay as the normalisation mode, the branching fraction of the $$ {\Lambda}_b^0\to {D}_s^{-}p $$ Λ b 0 → D s − p decay is measured to be $$ \mathcal{B}\left({\Lambda}_b^0\to {D}_s^{-}p\right)=\left(12.6\pm 0.5\pm 0.3\pm 1.2\right)\times {10}^{-6} $$ B Λ b 0 → D s − p = 12.6 ± 0.5 ± 0.3 ± 1.2 × 10 − 6 , where the first uncertainty is statistical, the second systematic and the third due to uncertainties in the branching fractions of the $$ {\Lambda}_b^0\to {\Lambda}_c^{+}{\pi}^{-} $$ Λ b 0 → Λ c + π − , $$ {D}_s^{-}\to {K}^{-}{K}^{+}{\pi}^{-} $$ D s − → K − K + π − and $$ {\Lambda}_c^{+}\to p{K}^{-}{\pi}^{+} $$ Λ c + → p K − π + decays.
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP07(2023)075
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2023
detail.hit.zdb_id:
2027350-2