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.

J. ABDALLAH, P. ABREU, W. ADAM, P. ADZIC, T. ALBRECHT, T. ALDERWEIRELD, et al. (2004). The Measurement of alpha(s) from event shapes with the DELPHI detector at the highest LEP energies. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 37, 1-23 [10.1140/epjc/s2004-01889-x].

The Measurement of alpha(s) from event shapes with the DELPHI detector at the highest LEP energies

NAVARRIA, FRANCESCO LUIGI;PAIANO, SIMONE;PERROTTA, ANDREA;ROVELLI, TIZIANO;
2004

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.
2004
J. ABDALLAH, P. ABREU, W. ADAM, P. ADZIC, T. ALBRECHT, T. ALDERWEIRELD, et al. (2004). The Measurement of alpha(s) from event shapes with the DELPHI detector at the highest LEP energies. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 37, 1-23 [10.1140/epjc/s2004-01889-x].
J. ABDALLAH; P. ABREU; W. ADAM; P. ADZIC; T. ALBRECHT; T. ALDERWEIRELD; R. ALEMANY-FERNANDEZ; T. ALLMENDINGER; P.P. ALLPORT; U. AMALDI; N. AMAPANE; S....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/11700
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