Multijet production in neutral current deep inelastic scattering at HERA and determination of alpha(s)
(2005) European Physical Journal C. Particles and Fields — Vol. 44, p. 183-193 (2005)
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- Abstract
- (en) Multijet production rates in neutral current deep inelastic scattering have been measured in the range of exchanged boson virtualities 10 < Q2 < 5000 GeV2. The data were taken at the ep collider HERA with centre-of-mass energy sqrt(s) = 318 GeV using the ZEUS detector and correspond to an integrated luminosity of 82.2 pb-1. Jets were identified in the Breit frame using the k_T cluster algorithm in the longitudinally invariant inclusive mode. Measurements of differential dijet and trijet cross sections are presented as functions of jet transverse energy E_{T,B}{jet}, pseudorapidity eta_{LAB}{jet} and Q2 with E_{T,B}{jet} > 5 GeV and -1 < eta_{LAB}{jet} < 2.5. Next-to-leading-order QCD calculations describe the data well. The value of the strong coupling constant alpha_s(M_Z), determined from the ratio of the trijet to dijet cross sections, is alpha_s(M_Z) = 0.1179 pm 0.0013(stat.) {+0.0028}_{-0.0046}(exp.) {+0.0064}_{-0.0046}(th.) Comment: 22 pages, 5 figures
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Piotrzkowski, K., Chekanov, S., de Favereau, J., & et al. (2005). Multijet production in neutral current deep inelastic scattering at HERA and determination of alpha(s). European Physical Journal C. Particles and Fields, 44, 183-193. https://doi.org/10.1140/epjc/s2005-02347-1 (Original work published 2005)