SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 59: QCD Theory and Experiment I
T 59.1: Vortrag
Mittwoch, 22. März 2023, 15:50–16:05, HSZ/0105
Measurement and QCD analysis of inclusive jet production in deep inelastic scattering at ZEUS — •Florian Lorkowski — DESY, Hamburg, Germany
The measurement of cross sections of deep inelastic scattering processes at the electron-proton collider HERA is a well established tool to test perturbative QCD predictions. Additionally, they can be used to determine the non-perturbative parton distribution functions of the proton. Measurements of jet production cross sections are particularly well suited to also constrain the strong coupling constant.
In this talk, a new measurement of inclusive jet cross sections in neutral current deep inelastic scattering using the ZEUS detector at the HERA collider is presented. The data were taken during the HERA 2 period at a center of mass energy of 318 GeV and correspond to an integrated luminosity of 347 pb−1. Massless jets, reconstructed using the k⊥-algorithm in the Breit reference frame, are measured as a function of the squared momentum transfer Q2 and the transverse momentum of the jets in the Breit frame p⊥,Breit.
The measured jet cross sections are compared to previous measurements as well as NNLO QCD theory predictions. The measurement is used in a QCD analysis at NNLO accuracy to perform a simultaneous determination of parton distribution functions of the proton and the strong coupling constant. A significantly improved accuracy is observed compared to similar measurements of the strong coupling constant.