218 articles – 617 references  [version française]
 HAL: in2p3-00022176, version 1
 arXiv: hep-ex/0406011
 European Physical Journal C 37 (2004) 1-23
 The measurement of $\alpha_{s}$ from event shapes with the DELPHI detector at the highest LEP energies
 For the DELPHI collaboration(s)
 (2004)
 Hadronic event shape distributions are determined from data in e+e- collisions between 183 and 207 GeV. From these the strong coupling alpha_s is extracted in O(alpha_s^2), NLLA and matched O(alpha_s^2)+NLLA theory. Hadronisation corrections evaluated with fragmentation model generators as well as an analytical power ansatz are applied. Comparing these measurements to those obtained at and around M_Z allows a combined measurement of alpha_s from all DELPHI data and a test of the energy dependence of the strong coupling.
 Subject(s) : Physics/High Energy Physics - Experiment