TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Jaimes Elles, S. J.
AU  - Jashal, B. K.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Rebollo De Miguel, M.
AU  - Ruiz Vidal, J.
AU  - Sanderswood, I.
AU  - Zhuo, J.
PY  - 2023
DA  - 2023//
TI  - Observation and branching fraction measurement of the decay Ξb- → Λ0 bπ-
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 072002
EP  - 16pp
VL  - 108
IS  - 7
PB  - Amer Physical Soc
AB  - The decay E-b -> A0bx-- is observed using a proton-proton collision data sample collected at center-of-ffiffimass energy p s 1/4 13 TeV with the LHCb detector, corresponding to an integrated luminosity of 5.5 fb-1. This process is mediated by the s -> uu over bar d quark-level transition, where the b quark in the E-b baryon is a spectator in the decay. Averaging the results obtained using the two A0b decay modes, A0b -> A thorn c x-- and A0b -> A thorn c x--x- thorn x--, the relative production ratio is measured to be ofE-b =fA0b thorn BoE-b -> A0bx-- thorn 1/4 o7.3 ⠂ 0.8 ⠂ 0.6 thorn x 10-4. Here the uncertainties are statistical and systematic, respectively, and fE-bofA0b thorn is the fragmentation fraction for a b quark into a E-b (A0b) baryon. Using an independent measurement of fE-b =fA0b, the branching fraction BoE-b -> A0bx-- thorn 1/4 o0.89 ⠂ 0.10 ⠂ 0.07 ⠂ 0.29 thorn % is obtained, where the last uncertainty is due to the assumed SU(3) flavor symmetry in the determination of fE-b =fA0b.
SN  - 2470-0010
UR  - https://arxiv.org/abs/2307.09427
UR  - https://doi.org/10.1103/PhysRevD.108.072002
DO  - 10.1103/PhysRevD.108.072002
LA  - English
N1  - WOS:001102989700001
ID  - LHCbCollaborationAaij_etal2023
ER  -