Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2007-06-25
Phys.Lett.B653:134-144,2007
Physics
High Energy Physics
High Energy Physics - Experiment
21 pages, 7 figures, submitted to Phys. Lett. B
Scientific paper
10.1016/j.physletb.2007.07.050
Inclusive jet production is studied in neutral current deep-inelastic positron-proton scattering at large four momentum transfer squared Q^2>150 GeV^2 with the H1 detector at HERA. Single and double differential inclusive jet cross sections are measured as a function of Q^2 and of the transverse energy E_T of the jets in the Breit frame. The measurements are found to be well described by calculations at next-to-leading order in perturbative QCD. The running of the strong coupling is demonstrated and the value of alpha_s(M_Z) is determined. The ratio of the inclusive jet cross section to the inclusive neutral current cross section is also measured and used to extract a precise value for alpha_s(M_Z)=0.1193+/-0.0014(exp.)^{+0.0047}_{-0.0030}(th.)+/-0.0016(pdf).
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