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Measurement of $\alpha_s$ from jet rates in deep inelastic scattering at HERA
- Publication Year :
- 1995
-
Abstract
- 16 pp. (1995).<br />Jet production in deep inelastic scattering for 120 < Q 2 < 3600 GeV 2 has been studied using data from an integrated luminosity of 3.2 pb −1 collected 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 ( α s 2 ) perturbative QCD calculations, allow a precise determination of α s ( Q ) in three Q 2 -intervals. The values are consistent with a running of ifα s ( Q ), as expected from QCD. Extrapolating to Q = M Z 0 α s ( M Z 0 ) = 0.117 ± 0.005 (stat) −0.005 +0.004 (syst exp ) ± 0.007 (syst theory ).
- Subjects :
- electron p: deep inelastic scattering
perturbation theory [quantum chromodynamics]
electron p [deep inelastic scattering]
strong interaction [coupling constant]
positron p [deep inelastic scattering]
jet: multiplicity
jet [electroproduction]
momentum transfer [dependence]
296 GeV-cms
jet: electroproduction
deep inelastic scattering: electron p
strong interaction: coupling constant
positron p [colliding beams]
spectrum: transverse momentum
deep inelastic scattering: positron p
ddc:530
deep inelastic scattering [positron p]
quantum chromodynamics: perturbation theory
colliding beams [electron p]
electroproduction [jet]
positron p: deep inelastic scattering
ZEUS
electron p [colliding beams]
transverse momentum [spectrum]
positron p: colliding beams
electroproduction: jet
colliding beams [positron p]
colliding beams: electron p
DESY HERA Stor
electron p: colliding beams
dependence: momentum transfer
colliding beams: positron p
transverse momentum: spectrum
deep inelastic scattering [electron p]
spectrum [transverse momentum]
coupling constant: strong interaction
multiplicity [jet]
coupling constant [strong interaction]
experimental results
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....bb3f7f428a9eb99a123260ec0dc60423