The measurement of from event shapes with the DELPHI detector at the highest LEP energies
Hadronic event shape distributions are determined from data in e + e - collisions between 183 and 207 GeV. From these the strong coupling is extracted in , NLLA and matched + 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 from all DELPHI data and a test of the energy dependence of the strong coupling.
© Springer-Verlag, 2004