We have studied hadronic events from e+e- annihilation data at centre-of-mass energies from 91 to 209 GeV. We present distributions of event shape observables and their moments at each energy and compare with QCD Monte Carlo models. From the event shape distributions we extract the strong coupling alpha_s and test its evolution with energy scale. The results are consistent with the running of alpha_s expected from QCD. Combining all data, the value of alpha_s(M_Z) is determined to be alpha_s(M_Z) = 0.1191 +- 0.0005 (stat.) +- 0.0010 (expt.) +- 0.0011 (hadr.) +- 0.0044 (theo.). The energy evolution of the moments is also used to determine a value of alpha_s with slightly larger errors: alpha_s(M_Z) = 0.1223 +- 0.0005 (stat.) +- 0.0014 (expt....
We present results obtained from a study of the structure of hadronic events recorded by the L3 dete...
Results are presented from a study of the structure of high energy hadronic events recorded by the L...
Consistent measurements of event-shape variables and alpha_s using the complete set of data taken wi...
We have studied hadronic events from e+e- annihilation data at centre-of-mass energies from 91 to 20...
CERN-LEP. Measurement of event shape variable distributions and their moments of hadronic production...
We have studied the structure of hadronic events with a hard, isolated photon in the final state (e(...
We have studied the structure of hadronic events with a hard, %radiated isolated photon in the final...
Results are presented from a study of the structure of high energy hadronic events recorded by the L...
Results are presented from a study of the structure of high energy hadronic events recorded by the L...
We present results obtained from a study of the structure of hadronic events recorded by the L3 dete...
Results are presented from a study of the structure of high energy hadronic events recorded by the L...
Consistent measurements of event-shape variables and alpha_s using the complete set of data taken wi...
We have studied hadronic events from e+e- annihilation data at centre-of-mass energies from 91 to 20...
CERN-LEP. Measurement of event shape variable distributions and their moments of hadronic production...
We have studied the structure of hadronic events with a hard, isolated photon in the final state (e(...
We have studied the structure of hadronic events with a hard, %radiated isolated photon in the final...
Results are presented from a study of the structure of high energy hadronic events recorded by the L...
Results are presented from a study of the structure of high energy hadronic events recorded by the L...
We present results obtained from a study of the structure of hadronic events recorded by the L3 dete...
Results are presented from a study of the structure of high energy hadronic events recorded by the L...
Consistent measurements of event-shape variables and alpha_s using the complete set of data taken wi...