Determination of 55-155-155-1in second order QCD from hadronic Z decays

Determination of 55-155-155-1in second order QCD from hadronic Z decays

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 αs are derived as a function of the renormalization scale from a quantitative analysis...

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Dades bibliogràfiques
Autors principals: Abreu, P, Adam, W, Adami, F, Adye, T, Akesson, T, Alekseev, G, Allen, P, Almehed, S, Alvsvaag, S, Amaldi, U, Anassontzis, E, Antilogus, P, Apel, W, Apsimon, R, Åsman, B, Augustin, J, Augustinus, A, Baillon, P, Bambade, P, Barao, F, Barate, R, Barbiellini, G, Bardin, D, Baroncelli, A, Barring, O
Format: Journal article
Idioma:English
Publicat: 1992
Descripció
Sumari: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 αs are derived as a function of the renormalization scale from a quantitative analysis of eight hadronic distributions. The final result, αs(MZ), 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. © 1992 Springer-Verlag.

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