Measurement of σΛb0/ σB?0×B(Λb0→Λc+π-)/B(B?0→D+π- ) in pp? Collisions at s=1.96TeV
Journal
Physical Review Letters
Journal Volume
98
Journal Issue
12
Date Issued
2007
Author(s)
Abulencia, A. et al. (CDF Collaboration)
Abstract
We present the first observation of the baryon decay Lambda b0-->Lambda c+pi- followed by Lambda c+-->pK-pi+ in 106 pb-1 pp collisions at square root s=1.96 TeV in the CDF experiment. In order to reduce systematic error, the measured rate for Lambda b0 decay is normalized to the kinematically similar meson decay B0-->D+pi- followed by D+-->pi+K-pi+. We report the ratio of production cross sections (sigma) times the ratio of branching fractions (B) for the momentum region integrated above pT>6 GeV/c and pseudorapidity range |eta|Lambda b0X)/sigma(pp-->B0X)xB(Lambda b0-->Lambda c+pi-)/B(B0-->D+pi-)=0.82+/-0.08(stat)+/-0.11(syst)+/-0.22[B(Lambda c+-->pK-pi+)].
Type
journal article