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Measurements of $\alpha_{s}$ from scaling violations and from R$_{\tau}$ at LEP

The results of two methods to extract the strong coupling constant, \alpha_s, are reviewed for the LEP experiments. In the first, scaling violations in the scaled momentum distributions of charged particles at LEP and at lower energy experiments are employed. In the second, QCD corrections to R_\tau...

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Detalles Bibliográficos
Autor principal: Reeves, P
Lenguaje:eng
Publicado: 1995
Materias:
Acceso en línea:http://cds.cern.ch/record/285106
Descripción
Sumario:The results of two methods to extract the strong coupling constant, \alpha_s, are reviewed for the LEP experiments. In the first, scaling violations in the scaled momentum distributions of charged particles at LEP and at lower energy experiments are employed. In the second, QCD corrections to R_\tau, the ratio of hadronic to leptonic decay rates of the tau lepton, determine \alpha_s and, using moments of the invariant mass distribution in hadronic tau decays, the non-perturbative corrections to R_\tau.