P. Abreu et al., A MEASUREMENT OF ALPHA(S) FROM THE SCALING VIOLATION IN E(-) ANNIHILATION()E(), Physics letters. Section B, 398(1-2), 1997, pp. 194-206
The hadronic fragmentation functions of the various quark flavours and
of gluons are measured in a study of the inclusive hadron production
from Z(0) decays with the DELPHI detector and are compared with the fr
agmentation functions measured elsewhere at energies between 14 GeV an
d 91 GeV. A large scaling violation is observed, which is used to extr
act the strong coupling constant from a fit using a numerical integrat
ion of the second order DGLAP evolution equations. The result is alpha
(s)(M-Z) = 0.124(-0.007)(+0.006) (exp) +/- 0.009(theory) where the fir
st error represents the experimental uncertainty and the second error
is due to the factorization and renormalization scale dependence. (C)
1997 Elsevier Science B.V.