Study of the kinematic dependences of Λb 0 production in pp collisions and a measurement of the Λb 0  → Λc + π branching fraction

The Lhcb Collaboration

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36 Scopus citations

Abstract

The kinematic dependences of the relative production rates, (formula presented), of Λ0 b baryons and B0 mesons are measured using Λ0 b → Λc + π and (formula presented) decays. The measurements use proton-proton collision data, corresponding to an integrated luminosity of 1 fb−1 at a centre-of-mass energy of 7 TeV, recorded in the forward region with the LHCb experiment. The relative production rates are observed to depend on the transverse momentum, pT, and pseudorapidity, η, of the beauty hadron, in the studied kinematic region 1.5 <pT <40 GeV/c and 2 <η <5. Using a previous LHCb measurement of (formula presented) in semileptonic decays, the branching fraction (formula presented) is obtained, where the first uncertainty is statistical, the second is systematic, the third is from the previous LHCb measurement of (formula presented) and the fourth is due to the (formula presented) branching fraction. This is the most precise measurement of a Λb 0 branching fraction to date.

Original languageEnglish (US)
Pages (from-to)1-18
Number of pages18
JournalJournal of High Energy Physics
Volume2014
Issue number8
DOIs
StatePublished - 2014

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Keywords

  • B physics
  • Branching fraction
  • Hadron-Hadron Scattering
  • Heavy quark production
  • Particle and resonance production

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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