Study of b-hadron decays to Λ+𝑐ℎ−ℎ′− final states
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13130_2024_Article_24266.pdf
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Author(s)
Aaij, R.
Abdelmotteleb, A. S. W.
Abellan Beteta, C.
Abudinén, F.
Ackernley, T.
Adefisoye, A. A.
Adeva, B.
Adinolfi, M.
Adlarson, P.
Agapopoulou, C.
Date Issued
August 19, 2024
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
The LHCb collaboration., Aaij, R., Abdelmotteleb, A.S.W. et al. Study of b-hadron decays to Λ+𝑐ℎ−ℎ′−
final states. J. High Energ. Phys. 2024, 132 (2024).
Version
Final published version
Abstract
Decays of Ξ−𝑏
and Ω−𝑏
baryons to Λ+𝑐ℎ−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 𝑠√
= 7, 8 and 13 TeV. The products of the relative branching fractions and fragmentation fractions for each signal mode, relative to the 𝐵−→Λ+𝑐𝑝⎯⎯⎯𝜋−
mode, are measured, with Ξ−𝑏→Λ+𝑐𝐾−𝜋−
, Ξ−𝑏→Λ+𝑐𝐾−𝐾−
and Ω−𝑏→Λ+𝑐𝐾−𝐾−
decays being observed at over 5 σ significance. The Ξ−𝑏→Λ+𝑐𝐾−𝜋−
mode is also used to measure the Ξ−𝑏
production asymmetry, which is found to be consistent with zero. In addition, the 𝐵−→Λ+𝑐𝑝⎯⎯⎯𝐾−
decay is observed for the first time, and its branching fraction is measured relative to that of the 𝐵−→Λ+𝑐𝑝⎯⎯⎯𝜋−
mode.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1007/JHEP08(2024)132
