PITHA 99/17 hep-ph/9906399 Direct determination of the gluon density in the proton from jet cross sections in deep-inelastic scattering

A QCD analysis of jet production in deep-inelastic scattering is presented. The studies are based on recent measurements of jet cross sections in the H1 experiment at HERA which are directly sensitive to the gluon density in the proton. The inclusion of H1 data on the inclusive deep-inelastic scattering cross section enables us to perform a consistent, simultaneous determination of the quark and gluon densities in the proton. The gluon density has been determined at fairly large values of 10−2 < x < 10−1 at a scale of the order of the transverse jet energies μf = 200 GeV . The result is consistent with indirect determinations from HERA structure function data and extends their range of sensitivity to larger x-values. Talk given on behalf of the H1 collaboration at the 7th International Workshop on Deep-Inelastic Scattering and QCD (DIS99), Zeuthen, April 1999. Direct determination of the gluon density in the proton from jet cross sections in deep-inelastic scattering M. Wobisch for the H1 collaboration III. Physikalisches Institut, RWTH Aachen, D-52056 Aachen, Germany A QCD analysis of jet production in deep-inelastic scattering is presented. The studies are based on recent measurements of jet cross sections in the H1 experiment at HERA which are directly sensitive to the gluon density in the proton. The inclusion of H1 data on the inclusive deep-inelastic scattering cross section enables us to perform a consistent, simultaneous determination of the quark and gluon densities in the proton. The gluon density has been determined at fairly large values of 10−2 < x < 10−1 at a scale of the order of the transverse jet energies μf = 200 GeV . The result is consistent with indirect determinations from HERA structure function data and extends their range of sensitivity to larger x-values.