We present an analysis of twist-2, leading order QCD amplitudes for hard exclusive leptoproduction of mesons in terms of double/nonforward parton distribution functions. After reviewing some general… (More)

We have calculated the NLO corrections to the twist-2 part of the deeply-virtual Compton scattering amplitude. Our results for the transverse and antisymmetric parts agree with recent calculations by… (More)

We describe a light-cone wave function formalism for hadroproduction of heavy-flavors via gluon-gluon fusion. The developed approach is well suited to address coherence effects in heavy-quark… (More)

Relaxation studies were conducted on specimens of bovine cancellous bone at post-yield strains. Stress and strain were measured for 1000s and the relaxation modulus was determined. Fifteen… (More)

In QCD the gauge-invariant gluon polarization ∆G in a nucleon can be defined either in a non-local way as the integral over the Ioffe-time distribution of polarized gluons, or in light-cone gauge as… (More)

We investigate shadowing corrections to the polarized deuteron structure functions g d 1 and b 1. In the kinematic domain of current fixed target experiments we observe that shadowing effects in g d… (More)

We investigate shadowing effects in deep-inelastic scattering from nuclei at small values x < 0.1 of the Bjorken variable. Unifying aspects of generalized vector meson dominance and color… (More)

We discuss the elastic photo-and leptoproduction of ρ 0-mesons from nucleons at Q 2 < ∼ 1 GeV 2 as studied in recent experiments at HERA and FNAL. We find that the mass distribution of the measured π… (More)

Nucleon structure functions, as measured in deep-inelastic lepton scattering, are studied within a covariant scalar diquark spectator model. Regarding the nucleon as an approximate two-body bound… (More)