0000000000732670

AUTHOR

María Ester Sánchez Rojo

showing 2 related works from this author

Study of orientation of 3-Jet events in Z(0) hacronic decays using the DELPHY detector

1992

The study of the orientation of three-jet events from e+ e- --> Z0 --> multi-hadrons is presented, in particular the polar angle distributions of the thrust axis and of the normal to the three-jet plane, and the azimuthal correlations between the hadron plane and the one defined by the beam and thrust axes. The data are compared with results at lower energy and with QCD predictions. Good agreement with QCD predictions is observed. The scalar gluon theory is excluded by the data.

High Energy Physics::LatticeHigh Energy Physics::PhenomenologyHigh Energy Physics::ExperimentFísica nuclearNuclear Experiment
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Determination of alpha-s in second order QCD from hadronic Z decays

1992

Distributions of event shape variables obtained from 120600 hadronic Z decays measured with the DELPHI detector are compared to the predictions of QCD based event generators. Values of the strong coupling constant alpha(s) are derived as a function of the renormalization scale from a quantitative analysis of eight hadronic distributions. The final result, alpha(s) (M(Z)) = 0.113 +/- 0.007, is based on second order perturbation theory and uses two hadronization corrections, one computed with a parton shower model and the other with a QCD matrix element model.

High Energy Physics::PhenomenologyHigh Energy Physics::ExperimentFísica nuclear
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