In composite models where vector bosons (IV*, g) and scalar boson (I-I) are made of the same subconstituents and especially in W-dominance models we show that couplings like HZ?, H77, Hgg can be rather large. As a consequence the decay pattern and the production rates of scalar bosons in e+e-, 77 and hadron-hadron collisions can be completely different from the standard Higgs case. Submitted to...

Despite the many empirical successes of QCD, there are a number of intriguing experimental anomalies that have been observed in heavy avor hadroproduc-tion, in measurements of azimuthal correlations in deep inelastic processes, and in measurements of spin correlations in hadronic reactions. Such phenomena point to color coherence and multiparton correlations in the hadron wavefunc-tions and phy...

Despite the many empirical successes of QCD, there are a number of intriguing experimental anomalies that have been observed in heavy flavor hadroproduction, in measurements of azimuthal correlations in deep inelastic processes, and in measurements of spin correlations in hadronic reactions. Such phenomena point to color coherence and multiparton correlations in the hadron wavefunctions and phy...

This talk summarizes recent QCD results from HERA, the Tevatron Collider and Tevatron fixed target experiments.

In recent years, hadron spectroscopy has become the most popular field of application of lattice QCD. Hadron masses, decay constants, and matrix elements for semileptonic decays are routinely computed from Green functions of composite hadron fields and expectation values of current operators between hadron states. However, the predictive power of lattice QCD is not limited to these kinds of cal...

These lectures give a pedagogical introduction to real and virtual Compton scattering at low energies. We will first discuss real Compton scattering off a point particle as well as a composite system in the framework of nonrela-tivistic quantum mechanics. The concept of electromagnetic polarizabilities is introduced. We then address a description of the Compton-scattering ten-sor within quantum...

We suggest a general formalism to treat a baryon as a composite system of three quarks and a ‘sea’. In this formalism, the sea is a cluster which can consists of gluons and quark-antiquark pairs. The hadron wave function with a sea component is given. The magnetic moments, related sum rules and axial weak coupling constants are obtained. The data seems to favor a vector sea rather than a scalar...

We review a recent global analysis of inclusive single-charged-hadron production in high-energy colliding-beam experiments, which is performed at nextto-leading order (NLO) in the parton model of quantum chromodynamics endowed with nonperturbative fragmentation functions (FFs). Comparisons of pp data from CERN SppS and the Fermilab Tevatron and γp data from DESY HERA with the corresponding NLO ...