Measurement of alpha-s from jet rates in deep inelastic scattering at HERA
Journal
Physics Letters
Journal Volume
B363
Pages
201-216
Date Issued
1995-10
Author(s)
Derrick, M. et al.(ZEUS Collaboration)
Abstract
Jet production in deep inelastic scattering for 120 < Q2< 3600 GeV2has been studied using data from an integrated luminosity of 3.2 pb-1collected with the ZEUS detector at HERA. Jets are identified with the JADE algorithm. A cut on the angular distribution of parton emission in the γ*-parton centre-of-mass system minimises the experimental and theoretical uncertainties in the determination of the jet rates. The jet rates, when compared to O(αs 2) perturbative QCD calculations, allow a precise determination of αs(Q) in three Q2-intervals. The values are consistent with a running of ifαs(Q), as expected from QCD. Extrapolating to Q = MZ0 αs(MZ0 ) = 0.117 ± 0.005 (stat)-0.005 +0.004(systexp) ± 0.007 (systtheory). © 1995.
Type
journal article