Jet Cross Sections in D* Photoproduction with ZEUS

Charm photoproduction in D* photoproduction have been studied using 78.6 pb-1 of data collected by the ZEUS detector. The measurement of inclusive jet cross section with a D* in the final state was performed in the kinematic region, Q2 < 1 GeV, 130 < W < 280 GeV, pTD* > 3 GeV, |ηD*| < 1.5, ETjet > 6 GeV and -1.5 < ηjet < 2.4. Differential cross sections as a function of ETjet and ηjet were compared to the NLO QCD predictions. There is a general agreement with the NLO QCD preditions. In addition to above requirements, a dijet sub-sample having at least two jets with ETjet > 6 GeV and the leading jet with ETjet > 7 GeV was used to measure dijet correlations. Dijet correlations are compared to the NLO QCD predictions and leading-order (LO) Monte Carlo (MC) models with parton showers (PS). Dijet correlations are described well by the LO+PS models, while the NLO QCD prediction underestimates the measurement in the region where higher-order effects are expected to become significant