I report on some recent developments in nonperturbative studies of finite temperature QCD with dynamical quarks on the lattice. I discuss new studies of improved lattice actions and their application to finite temperature QCD. I also summarize the status of lattice investigations about the order of the finite temperature QCD transition for the case of two flavors of degenerate light quarks, usi...

Lattice QCD is a powerful method to study Quantum chromodynamics (QCD) in a nonperturbative way. In lattice QCD, a path integral is directly evaluated on a discrete space-time lattice by means of the Monte Carlo method. As computer technology advances PC clusters can also be used for lattice QCD simulations as well as a number of commercial supercomputers. Since lattice QCD simulations demand h...

Recent advances in lattice field theory, in computer technology and in chiral perturbation theory have enabled lattice QCD to emerge as a powerful quantitative tool in understanding hadron structure. I describe recent progress in the computation of the nucleon form factors and moments of parton distribution functions, before proceeding to describe lattice studies of the Generalized Parton Distr...

The title ‘Chiral extrapolations’ of this contribution refers more precisely to chiral extrapolations of lattice QCD data. We shall deal with low-energy aspects of QCD, which are not accessible to ordinary weak-coupling perturbation theory. Possible alternatives to weak-coupling perturbation theory in the low-energy domain of QCD include the investigation of specific models, Monte Carlo simulat...

We adopt a factorized QCD formalism to describe the transverse momentum distribution of lowmass lepton pairs produced in pp collisions, when the pair transverse momentum QT ≫ Q, with the pair’s invariant mass Q as low as Q ∼ ΛQCD. We extend this formalism to dilepton production in AA collisions by including the nuclear dependent power correction due to parton multiple scattering.

Recent results of lattice QCD at finite temperature and density are reviewed. At vanishing density the transition temperature, the equation of state and hadron properties are discussed both for the pure gauge theory and for dynamical staggered, Wilson and overlap fermions. The second part deals with finite density. There are recent results for full QCD at finite temperature and moderate density...

We investigate the threshold-enhanced QCD corrections to the cross sections for direct top quark productions induced by model-independent flavor changing neutral current couplings at hadron colliders. We use the soft-collinear effective theory to describe the incoming massless partons and use the heavy quark effective theory to treat the top quark. Then we construct the flavor changing operator...

We use the SLAC lattice QCD theory to compute the large distance contribution to the process q+p + qH +q, +X, where qH is a heavy quark. In this way, we complete the usual short distance analysis of this process. The relationship between our completion and observation is discussed. Submitted to Progress of Theoretical Physics * Work supported by the Department of Energy, contract DE AC03 76SF00...