A Measurement of the semileptonic branching ratio BR(b-baryon ---> p lepton anti-neutrino X) and a study of inclusive pi+-, K+-, (p,anti-p) production in Z decays

ALEPH Collaboration, The and Barate, R. and Betteridge, Andrew and Bowdery, Christopher and Colrain, Paul and Finch, Alexander and Foster, Frank and Hughes, Gareth and Jones, Roger and Williams, Mark (1998) A Measurement of the semileptonic branching ratio BR(b-baryon ---> p lepton anti-neutrino X) and a study of inclusive pi+-, K+-, (p,anti-p) production in Z decays. The European Physical Journal C (EPJ C) - Particles and Fields, 5 (2). pp. 205-227. ISSN 1434-6052

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Abstract

Inclusive π± , K± and ( p,p¯ ) production is investigated using data recorded by the aleph detector between 1992 and 1994. The momentum spectra and multiplicities are measured separately in Z→bb¯ , Z→cc¯ and Z→u\baru,dd¯,ss¯ decays. The number of protons found in b-hadron decays is used to estimate the fraction of b-baryons in b events to be (10.2±0.7±2.7)% assuming BR(b-baryon →pX)=(58±6)% . From an additional study of proton-lepton correlations in b events, the branching ratio BR(b-baryon→plν¯X)=(4.63±0.72±0.98)% is obtained. The ratio BR(b-baryon→plν¯X)/BR(b-baryon→pX) is found to be 0.080±0.012±0.014 .

Item Type:
Journal Article
Journal or Publication Title:
The European Physical Journal C (EPJ C) - Particles and Fields
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2201
Subjects:
ID Code:
63998
Deposited By:
Deposited On:
15 May 2013 10:26
Refereed?:
Yes
Published?:
Published
Last Modified:
14 Jul 2020 03:31