A Measurement of the Product Branching Ratio f(b->Lambdab).BR(Lambdab->Lambda X) in Z0 Decays
The OPAL Collaboration, G. Abbiendi et al
Abstract
The product branching ratio, f(b->Lambdab).BR(Lambdab->Lambda X), where Lambdab denotes any weakly-decaying b-baryon, has been measured using the OPAL detector at LEP. Lambdab are selected by the presence of energetic Lambda particles in bottom events tagged by the presence of displaced secondary vertices. A fit to the momenta of the Lambda particles separates signal from B meson and fragmentation backgrounds. The measured product branching ratio is f(b->Lambdab).BR(Lambdab->Lambda X) = (2.67+-0.38(stat)+0.67-0.60(sys))% Combined with a previous OPAL measurement, one obtains f(b->Lambdab).BR(Lambdab->Lambda X) = (3.50+-0.32(stat)+-0.35(sys))%.
Create a lesson
Related papers
A machine-learning method for the estimation of the background from jets misidentified as hadronic tau lepton decays
CMS Collaboration
Recent results in b → s\, transitions at LHCb
Juan Jose Juan Castella
Determination of U-spin breaking parameters with an amplitude analysis of the decay D0 KS,L0π+π-
BESIII Collaboration, M. Ablikim, M. N. Achasov et al.
Observation of a Threshold Enhancement in the π0π0 Mass Spectrum in ψ(3686) → π0π0J/ψ Decays
BESIII Collaboration, M. Ablikim, M. N. Achasov et al.
HepUKE: Uncertainty-aware Knowledge Evolution for High Energy Physics Analysis Agents
Zijie Shang, Ke Li, Junkun Jiao et al.
A compact, interrogable Tree Tensor Network Jet Tagger on Lund declustering trees
Fabrizio Napolitano, Luca Della Penna, Tommaso Tedeschi et al.