The decay E-b -> A0bx-- is observed using a proton-proton collision data sample collected at center-of-mass 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.

Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Observation and branching fraction measurement of the decay Ξb- → Λ0 bπ -. PHYSICAL REVIEW D, 108(7) [10.1103/PhysRevD.108.072002].

Observation and branching fraction measurement of the decay Ξb- → Λ0 bπ -

Borsato, M;Calvi, M;Capelli, S;Carniti, P;Fazzini, D;García Pardiñas, J;Gotti, C;Kirsebom, VS;Martinazzoli, L;Martinelli, M;Minotti, A;Pizzichemi, M;Salomoni, M;Shields, EB;
2023

Abstract

The decay E-b -> A0bx-- is observed using a proton-proton collision data sample collected at center-of-mass 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.
Articolo in rivista - Articolo scientifico
Bottom baryons
English
26-lug-2023
2023
108
7
none
Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Observation and branching fraction measurement of the decay Ξb- → Λ0 bπ -. PHYSICAL REVIEW D, 108(7) [10.1103/PhysRevD.108.072002].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/468903
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