Determination of the strong coupling constant alpha_s(M_Z) based on jet data from HERA

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H1prelim-11-132

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Abstract The jet data by the H1 and ZEUS collaborations are used simultaneously to extract the strong coupling constant $\alpha_s(M_Z)$. The analysis makes use of calculations of jet cross sections in pQCD at NLO. It provides an accurate determination of $\alpha_s(M_Z)$ with an uncertainty comparable to those obtained from jet measurements at other colliders.
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