Measurement of Normalised Multi-jet Cross Sections using Regularised Unfolding and Extraction of alphas(MZ) in DIS at High Q2
Abstract
New results on normalised inclusive jet, dijet and trijet differential cross sections in neutral current DIS based on a regularised unfolding procedure are presented. Compared to a previously published result on normalised multi-jet cross sections, the new features are an extended range in jet pseudorapidity, an improved hadronic energy scale uncertainty of 1% and the application of an unfolding procedure. The normalised jet cross sections are compared to QCD calculations at NLO. The value of the strong coupling determined from the normalised inclusive jet, dijet and trijet measurements simultaneously is alphas(MZ) = 0.1163 +/- 0.0008 (exp.) +/- 0.0011 (sys.) +0.0044 / -0.0035 (theo.) +/- 0.0014 (PDF).
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