Two-Jet and Three-Jet Differential Event Shapes in Deep-Inelastic Scattering
----------------------------------------------------------------------------

Deep-inelastic ep scattering data, taken with the H1 detector at HERA and corresponding to an integrated luminosity of 112 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), three-jet event shapes (out-of-event-plane momentum and azimuthal correlation) as well as two, three and four jet rates. The four-momentum transfer Q is taken to be the relevant energy scale and ranges between 14 GeV and 200 GeV. Fits are performed to the two-jet event shape distributions using next-to-leading order QCD predictions, matched to a leading logarithmic resummation and power law corrections to account for hadronisation effects. The three-jet event shapes and jet rates are compared with QCD calculations and Monte Carlo models.