In this report we summarize new results on lepton-nucleon deep inelastic scattering (DIS) from the fixed target experiments NuTeV and Hermes, and from the ep collider HERA in the range of four-momentum transfer squared, Q2, between 0.35 and 30000 GeV2. Recent next-to-leading-order (NLO) QCD fits and uncertainties of the parton distribution functions (PDFs) are discussed. In the theory part of t...

In this paper, we do a global analysis of B → PP and PV decays with QCD factorization approach. It is encouraging to observe that the predictions of QCD factorization are in good agreement with the experiments. The best fit γ is around 79◦. The penguin-to-tree ratio |Pππ/Tππ| of π+π− decays is prefered to be larger than 0.3. We also show the confidence levels for some interesting channels: B0 →...

We calculate the photoproduction of heavy quarks in proton-proton collisions at RHIC, Tevatron and LHC energies. The integrated cross section and the rapidity distributions for open charm and bottom production are computed employing sound high energy QCD formalisms. For the linear pQCD approaches we consider both the usual collinear factorization and the k⊥factorization formalisms, whereas for ...

We consider the factorization properties of on-shell QCD amplitudes with massive partons in the limit when all kinematical invariants are large compared to the parton mass and discuss the structure of their infrared singularities. The dimensionally regulated soft poles and the large collinear logarithms of the parton masses exponentiate to all orders. Based on this factorization a simple relati...

Since an old observation by Beenakker et al, the evaluation of QCD processes in dimensional reduction has repeatedly led to terms that seem to violate the QCD factorization theorem. We reconsider the example of the process gg → tt̄ and show that the factorization problem can be completely resolved. A natural interpretation of the seemingly non-factorizing terms is found, and they are rewritten i...