A measurement of the product branching ratio f(b → Λb) · BR(Λb → ΛX) in Z0 decays

The OPAL Collaboration

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17 Scopus citations

Abstract

The product branching ratio, f(b → Λb) · BR(Λb → ΛX), where Λb denotes any weakly-decaying b-baryon, has been measured using the OPAL detector at LEP. Λb's are selected by the presence of energetic Λ particles in bottom events tagged by the presence of displaced secondary vertices. A fit to the momenta of the Λ particles separates signal from B meson and fragmentation backgrounds. The measured product branching ratio is f(b → Λb) · BR(Λb → ΛX) = (2.67) ± 0.38(stat)+0.67-0.60(sys))%. Combined with a previous OPAL measurement, one obtains f(b → Λb) · BR(Λb → ΛX) = (3.50) ± 0.32(stat) ± 0.35(sys))%.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalEuropean Physical Journal C
Volume9
Issue number1
DOIs
StatePublished - 1 Jan 1999
Externally publishedYes

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

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