Determination of alpha s from the Scaling Violation in the Fragmentation Functions e+e- Annihilation
par Abreu, Pedro;Bertrand, Daniel 
; [et al.]
Référence Physics letters. Section B, 311, 1-4, page (408-424)
Publication Publié, 1993
; [et al.]Référence Physics letters. Section B, 311, 1-4, page (408-424)
Publication Publié, 1993
Article révisé par les pairs
| Résumé : | A determination of the hadronic fragmentation functions of the Z0 boson is presented from a study of the inclusive hadron production with the DELPHI detector at LEP. These fragmentation functions were compared with the ones at lower energies, thus covering data in a large kinematic range: 196 ≤ Q2 ≤ 8312 GeV2 and x (= Ph Ebeam) > 0.08. A large scaling violation was observed, which was used to extract the strong coupling constant in second order QCD: αs(MZ) = 0.118 ± 0.005. The corresponding QCD scale for five quark flavours is: Λ (5) MS = 230 ± 60 MeV. |
