# The measurement of $\alpha_{s}$ from event shapes with the DELPHI detector at the highest LEP energies

Abstract : 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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00022176
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Submitted on : Tuesday, August 31, 2004 - 9:59:30 AM
Last modification on : Friday, September 10, 2021 - 1:50:06 PM

### Citation

J. Abdallah, P. Abreu, W. Adam, P. Adzic, T. Albrecht, et al.. The measurement of $\alpha_{s}$ from event shapes with the DELPHI detector at the highest LEP energies. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2004, 37, pp.1-23. ⟨10.1140/epjc/s2004-01889-x⟩. ⟨in2p3-00022176⟩

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