{"id":{"repo_id":"aachen","oai_identifier":"oai:publications.rwth-aachen.de:59545"},"canonical_url":"https://search.dev.ndltd.org/etd/aachen/oai:publications.rwth-aachen.de:59545","repository":{"repo_id":"aachen","name":"RWTH Aachen University","base_url":"https://publications.rwth-aachen.de/oai2d"},"display":{"title":"Measurement and QCD analysis of event shape variables in deep-ineleastic electron-proton collisions at HERA","abstract":"Deep-inelastic ep scattering data, taken with the H1 detector at HERA and corresponding to an integrated luminosity of 106 pb^-1 are used to study the differential distributions of event shape variables. These include two-jet event shapes (thrust, jet broadening, jet mass and the C-parameter), as well as three-jet event shapes (out-of-event-plane momentum and azimuthal correlation) and jet rates. The four-momentum transfer Q is taken to be the relevant energy scale and ranges between 14 GeV and 200 GeV. The event shape distributions are compared with perturbative QCD predictions, which include resummed contributions for many of the observables. Power law corrections are applied to the predictions to account for hadronisation effects. A QCD fit is presented for the two-jet event shapes and consistent results are found for the strong coupling constant alpha_s and the non-perturbative parameter alpha_0.","abstract_html":"Deep-inelastic ep scattering data, taken with the H1 detector at HERA and corresponding to an integrated luminosity of 106 pb^-1 are used to study the differential distributions of event shape variables. These include two-jet event shapes (thrust, jet broadening, jet mass and the C-parameter), as well as three-jet event shapes (out-of-event-plane momentum and azimuthal correlation) and jet rates. The four-momentum transfer Q is taken to be the relevant energy scale and ranges between 14 GeV and 200 GeV. The event shape distributions are compared with perturbative QCD predictions, which include resummed contributions for many of the observables. Power law corrections are applied to the predictions to account for hadronisation effects. 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These include two-jet event shapes (thrust, jet broadening, jet mass and the C-parameter), as well as three-jet event shapes (out-of-event-plane momentum and azimuthal correlation) and jet rates. The four-momentum transfer Q is taken to be the relevant energy scale and ranges between 14 GeV and 200 GeV. The event shape distributions are compared with perturbative QCD predictions, which include resummed contributions for many of the observables. Power law corrections are applied to the predictions to account for hadronisation effects. A QCD fit is presented for the two-jet event shapes and consistent results are found for the strong coupling constant alpha_s and the non-perturbative parameter alpha_0."]},{"key":"dc:source","label":"Dc Source","values":["Aachen : Publikationsserver der RWTH Aachen University IV, 129 S. : graph. Darst. (2004). = Aachen, Techn. Hochsch., Diss., 2004"]},{"key":"dc:title","label":"Title","values":["Measurement and QCD analysis of event shape variables in deep-ineleastic electron-proton collisions at HERA"]}]}],"canonical_facts":{"dc:contributor":["Berger, Christoph"],"dc:coverage":["DE"],"dc:creator":["Kluge, Thomas"],"dc:date":["2004"],"dc:description":["Deep-inelastic ep scattering data, taken with the H1 detector at HERA and corresponding to an integrated luminosity of 106 pb^-1 are used to study the differential distributions of event shape variables. These include two-jet event shapes (thrust, jet broadening, jet mass and the C-parameter), as well as three-jet event shapes (out-of-event-plane momentum and azimuthal correlation) and jet rates. The four-momentum transfer Q is taken to be the relevant energy scale and ranges between 14 GeV and 200 GeV. The event shape distributions are compared with perturbative QCD predictions, which include resummed contributions for many of the observables. 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