par Abreu, Pedro;Bertrand, Daniel 
; [et al.]
Référence Physics letters. Section B, 474, 1-2, page (205-222)
Publication Publié, 2000
; [et al.]Référence Physics letters. Section B, 474, 1-2, page (205-222)
Publication Publié, 2000
Article révisé par les pairs
| Résumé : | The longitudinal polarization of the Λb baryon is measured at the LEP e+e- collider by DELPHI. It is determined from b the charged lepton and neutrino energy spectra in 249±19 Λb semileptonic decays reconstructed in ≈3.5 million hadronic b Z0 decays using Λ0-lepton correlations. The measured polarization is: PΛb = -49q±0.32 -30(stat)±0.17(syst.) |
