An analysis of global event-shape variables has been carried out for the reaction e+e-→Z0→hadrons to measure the strong coupling constant αs. This study is based on 52 720 hadronic events obtained in 1989/90 with the ALEPH detector at the LEP collider at energies near the peak of the Z-resonance. In order to determine αs, second order QCD predictions modified by effects of perturbative higher orders and hadronization were fitted to the experimental distributions of event-shape variables. From a detailed analysis of the theoretical uncertainties we find that this approach is best justified for the differential two-jet rate, from which we obtain αs(MZ2) = 0.121 ± 0.002(stat.)±0.003(sys.)±0.007(theor.) using a renormalization scale ω = 1 2MZ. ...
We have studied the structure of hadronic events with a hard, isolated photon in the final state (e<...
An analysis of hadronic Z° decays observed in the OPAL detector at LEP is presented. The analysis in...
Using 109000 hadronic events obtained with the ALEPH detector at LEP at energies close to the Z reso...
An analysis of global event-shape variables has been carried out for the reaction e+e-→Z0→hadrons to...
An analysis of global event-shape variables has been carried out for the reaction e +e - -> Z 0-&...
We present a study of the global event shape variables thrust and heavy jet mass, of energy-energy c...
We present a study of the global event shape variables thrust and heavy jet mass, of energy-energy c...
The strong coupling αs(MZ2) has been measured using hadronic decays of Z0 bosons collected by the SL...
Using 106 000 hadronic events obtained with the ALEPH detector at LEP at energies close to the Z res...
We present a study of the global event shape variables thrust and heavy jet mass, of energy-energy c...
Distributions of event shape variables obtained from 120600 hadronic Z decays measured with the DELP...
We present a study of the global event shape variables thrust and heavy jet mass, of energy-energy c...
We have determined the strong coupling αs from measurements of jet rates in hadronic decays of Z0 bo...
We have studied the structure of hadronic events with a hard, isolated photon in the final state (e<...
An analysis of hadronic Z° decays observed in the OPAL detector at LEP is presented. The analysis in...
Using 109000 hadronic events obtained with the ALEPH detector at LEP at energies close to the Z reso...
An analysis of global event-shape variables has been carried out for the reaction e+e-→Z0→hadrons to...
An analysis of global event-shape variables has been carried out for the reaction e +e - -> Z 0-&...
We present a study of the global event shape variables thrust and heavy jet mass, of energy-energy c...
We present a study of the global event shape variables thrust and heavy jet mass, of energy-energy c...
The strong coupling αs(MZ2) has been measured using hadronic decays of Z0 bosons collected by the SL...
Using 106 000 hadronic events obtained with the ALEPH detector at LEP at energies close to the Z res...
We present a study of the global event shape variables thrust and heavy jet mass, of energy-energy c...
Distributions of event shape variables obtained from 120600 hadronic Z decays measured with the DELP...
We present a study of the global event shape variables thrust and heavy jet mass, of energy-energy c...
We have determined the strong coupling αs from measurements of jet rates in hadronic decays of Z0 bo...
We have studied the structure of hadronic events with a hard, isolated photon in the final state (e<...
An analysis of hadronic Z° decays observed in the OPAL detector at LEP is presented. The analysis in...
Using 109000 hadronic events obtained with the ALEPH detector at LEP at energies close to the Z reso...