Title
Measurement of the <tex>$\Lambda_{b}^{0}$</tex> decay form factor Measurement of the <tex>$\Lambda_{b}^{0}$</tex> decay form factor
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Amsterdam ,
Subject
Physics
Source (journal)
Physics letters: B. - Amsterdam, 1967, currens
Volume/pages
585(2004) :1/2 , p. 63-84
ISSN
0370-2693
ISI
000220317500010
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The form factor of Λb0 baryons is estimated using 3.46×106 hadronic Z decays collected by the DELPHI experiment between 1992 and 1995. Charmed Λc+ baryons fully reconstructed in the pK−π+, pK0S, and Λπ+π+π− modes, are associated to a lepton with opposite charge in order to select Image decays. From a combined likelihood and event rate fit to the distribution of the IsgurWise variable w, and using the Heavy Quark Effective Theory (HQET), the slope of the b-baryon form factor is measured to be Image The exclusive semileptonic branching fraction Image can be derived from Image and is found to be (5.0+1.1−0.8(stat)+1.6−1.2(syst))%. Limits on other branching fractions are also obtained.
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