TH Meeting on Particle Physics Phenomenology

Determination of <font face="Symbol">a</font><sub>s</sub> from DIS data in NNLO QCD approximation

Name: Determination of a s from DIS data in NNLO QCD approximation
Start: 2002-04-05T14:00:00+02:00
End: 2002-04-05T15:00:00+02:00
Location: CERN

by Sergey ALEKHIN (Serpukhov)

Friday 5 Apr 2002, 14:00 → 15:00 Europe/Zurich

PS Auditorium (CERN)

PS Auditorium

CERN

Description

Results of the perturbative QCD analysis of existing data on deep-inelastic-scattering of charged leptons off proton and deuterium targets are presented. The value of strong coupling constant a_s, the leading-twist parton distributions, and the high-twist terms are determined simultaneously from the fit with account of the corrections up to next-to-next-to-leading order of QCD. Impact of different assumptions made in the analysis and associated theoretical uncertainties in a_s are analyzed with a particular attention paid on the correlation of the high-twist terms and the fitted value of a_s.