In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2024, No. 8 ( 2024-08-19)
Abstract:
Decays of $$ {\Xi}_b^{-} $$ Ξ b − and $$ {\Omega}_b^{-} $$ Ω b − baryons to $$ {\Lambda}_c^{+}{h}^{-}{h}^{\prime -} $$ Λ c + h − h ′ − final states, with h − h ′− being π − π − , K − π − and K − K − meson pairs, are searched for using data collected with the LHCb detector. The data sample studied corresponds to an integrated luminosity of 8 . 7 fb − 1 of pp collisions collected at centre-of-mass energies $$ \sqrt{s} $$ s = 7, 8 and 13 TeV. The products of the relative branching fractions and fragmentation fractions for each signal mode, relative to the $$ {B}^{-}\to {\Lambda}_c^{+}\overline{p}{\pi}^{-} $$ B − → Λ c + p ¯ π − mode, are measured, with $$ {\Xi}_b^{-}\to {\Lambda}_c^{+}{K}^{-}{\pi}^{-} $$ Ξ b − → Λ c + K − π − , $$ {\Xi}_b^{-}\to {\Lambda}_c^{+}{K}^{-}{K}^{-} $$ Ξ b − → Λ c + K − K − and $$ {\varOmega}_b^{-}\to {\Lambda}_c^{+}{K}^{-}{K}^{-} $$ Ω b − → Λ c + K − K − decays being observed at over 5 σ significance. The $$ {\Xi}_b^{-}\to {\Lambda}_c^{+}{K}^{-}{\pi}^{-} $$ Ξ b − → Λ c + K − π − mode is also used to measure the $$ {\Xi}_b^{-} $$ Ξ b − production asymmetry, which is found to be consistent with zero. In addition, the $$ {B}^{-}\to {\Lambda}_c^{+}\overline{p}{K}^{-} $$ B − → Λ c + p ¯ K − decay is observed for the first time, and its branching fraction is measured relative to that of the $$ {B}^{-}\to {\Lambda}_c^{+}\overline{p}{\pi}^{-} $$ B − → Λ c + p ¯ π − mode.
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP08(2024)132
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2024
detail.hit.zdb_id:
2027350-2
