Lambda(b) polarization in Z0 decays at LEP

Abreu, P.;Cortina Gil, Eduardo;DELPHI Collaboration;et.al.
(2000) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 474, n° 1-2, p. 205-222 (2000)

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Abstract
The longitudinal polarization of the Λb baryon is measured at the LEP e+e− collider by DELPHI. It is determined from the charged lepton and neutrino energy spectra in 249±19 Λb semileptonic decays reconstructed in ≈3.5 million hadronic Z0 decays using Λ0-lepton correlations. The measured polarization is: PΛb=−0.49−0.30+0.32(stat.)±0.17(syst.)
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Abreu, P., Cortina Gil, E., DELPHI Collaboration, & et al. (2000). Lambda(b) polarization in Z0 decays at LEP. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 474(1-2), 205-222. https://doi.org/10.1016/S0370-2693(99)01431-8 (Original work published 2000)