Multi-jet event rates in deep inelastic scattering and determination of the strong coupling constant

H1 Collaboration:     C. Adloff - et al.

doi:doi:10.1007/s100529901014

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2024 Impact factor 4.8

Particles and Fields

Eur. Phys. J. C 6, 575-585
DOI 10.1007/s100529901014

Multi-jet event rates in deep inelastic scattering
and determination of the strong coupling constant

H1 Collaboration

C. Adloff³⁴ - et al.

³⁴ Fachbereich Physik, Bergische Universität Gesamthochschule Wuppertal, Wuppertal, Germany

Received: 20 July 1998 / Revised version: 20 August 1998 / Published online: 25 January 1999

Abstract
Jet event rates in deep inelastic ep $\,$ scattering at HERA are investigated applying the modified JADE jet algorithm. The data are corrected for detector and hadronization effects and then compared with perturbative QCD predictions using next-to-leading order calculations. The strong coupling constant $\alpha_{s}(M_Z^{2})$ is determined evaluating the jet event rates. Values of $\alpha_{s}(Q^{2})$ are extracted in four different bins of the negative squared momentum transfer Q² in the range from 40 GeV $^2\,$ to 4000 GeV $^2\,$ . A combined fit of the renormalization group equation to these several $\alpha_{s}(Q^{2})$ values results in $\alpha_{s}(M_Z^{2})= 0.117 \pm 0.003 \,(stat) \, ^{+\,0.009}_{-\,0.013} \,(sys) \, + 0.006 \,(jet\; algorithm)$ .