A measurement of alpha(s) from the scaling violation in e(+)e(-) annihilation

Journal article

The hadronic fragmentation functions of the various quark flavours and of gluons are measured in a study of the inclusive hadron production from Z0 decays with the DELPHI detector and are compared with the fragmentation functions measured elsewhere at energies between 14 GeV and 91 GeV. A large scaling violation is observed, which is used to extract the strong coupling constant from a fit using a numerical integration of the second order DGLAP evolution equations. The result is αs(Mz) = 0.1241+0.006-0.007(exp) ±0.009(theory) where the first error represents the experimental uncertainty and the second error is due to the factorization and renormalization scale dependence. © 1997 Elsevier Science B.V.

Authors: Abreu, P; Adam, W; Adye, T; Ajinenko, I; Alekseev, G

• Publication status: Published
• Journal: Physics Letters B
• Volume: 398
• Issue: 1-2
• Pages: 194-206
• Publication date: 1997-04-10
• DOI: 10.1016/S0370-2693(97)00256-6
• ISSN: 0370-2693
• Language: English