Measurement of ${\alpha }_S$ from Jet Rates in Deep Inelastic Scattering at HERA

Abstract

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 ${\gamma }^{\ast }$-parton centre-of-mass system minimises the experimental and theoretical uncertainties in the determination of the jet rates. The jet rates, when compared to $\mathcal{O}$(${\alpha }_s$^2$)perturbativeQCDcalculations,allowaprecisedeterminationof$α_{s}(Q)$inthree$Q^2$-intervals.Thevaluesareconsistentwitharunningof$α_{s}(Q)$,asexpectedfromQCD.Extrapolatingto$Q=M_{Z^0}$yields$α_{s}(M_{Z^0}) = 0.117~\pm~0.005~(stat)~^{+0.004}_{-0.005}~(syst_{exp})~ ~{\pm~0.007}~(syst_{theory})$.

arXiv comment22 pages, latex, 4 figures appended as uuencoded file

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Cited by in corpus (20)

• 50 Years of Quantum Chromodynamics
• Determination of the QCD Coupling ${\alpha }_s$
• Multi-jet cross sections in deep inelastic scattering at next-to-leading order
• HERA Collider Physics
• Inclusive jet cross sections in the Breit frame in neutral current deep inelastic scattering at HERA and determination of alpha_s
• Measurement of dijet production in neutral current deep inelastic scattering at high Q**2 and determination of alpha_s
• Measurement of subjet multiplicities in neutral current deep inelastic scattering at HERA and determination of ${\alpha }_s$
• Test of the Running of ${\alpha }_s$ in $\tau$ Decays
• Three-Jet Production in Deep-Inelastic Scattering at HERA
• Multijet production in neutral current deep inelastic scattering at HERA and determination of alpha_s
• The QCD Coupling Constant
• Experimental Tests of Asymptotic Freedom
• disorder: Deep inelastic scattering at high orders
• Measurement of groomed event shape observables in deep-inelastic electron-proton scattering at HERA
• Jets and fragmentation
• Deep Inelastic Scattering at HERA
• Differences between Monte Carlo models for DIS at small-x and the relation to BFKL dynamics
• QCD Corrections to Jet Cross Sections in DIS
• Jet substructure in neutral current deep inelastic e+p scattering at upcoming Electron-Ion Collider
• Progress and Problems in QCD - Report from the Hadronic Final States Working Group at DIS99