Measurement of dijet production at low Q2 at HERA.

The analyses of jet production in various high energy processes have become a major field for testing perturbative QCD. In the case of electron-proton collisions, investigated in the thesis, the jet cross sections are successfully described in most of the HERA kinematic range by next-to-leading (NLO) QCD calculations. However, regions of phase space have previously been identified where NLO predictions do not reproduce the data satisfactorily. The presented analysis describes a new measurement of the dijet cross sections together with detailed comparisons of the data with available perturbative QCD calculations in order to identify which of them describe the data in which region. Doing that we use NLO QCD calculations as well as LO calculations supplemented with parton showers, which take into account leading logarithmic contributions to all orders.Available from STL Prague, CZ / NTK - National Technical LibrarySIGLECZCzech Republi