in this paper, we derive the exact analytical expressions for the shannon entropy of generalized orderstatistics from pareto-type and related distributions.

Being the “mother distributions” of all types two-parton correlation functions, generalized transverse momentum dependent parton distributions (GTMDs) have attracted a lot attention over last years. We argue that exclusive double production pseudoscalar quarkonia (ηc or ηb) in nucleon-nucleon collisions gives access to GTMDs gluons.

We estimate the leading order amplitudes for exclusive photon and meson electroproduction reactions at large Q2 in the valence region in terms of skewed quark distributions. As experimental investigations can currently only be envisaged at moderate values of Q2 , we estimate power corrections due to the intrinsic transverse momentum of the partons in the meson wavefunction and in the nucleon. T...

Abstract. Hadron structure from high-Q2 γ∗ p scattering processes is often expressed in terms of hadronic matrix elements of nonlocal operators. Properly defining and interpreting these quantities is very important in light of experiments aiming to extract transverse momentum dependent parton distributions or generalized parton distributions. The current status will be reviewed, including recen...

We discuss the two-photon exchange contribution to observables which involve lepton helicity flip in elastic lepton-nucleon scattering. This contribution is accessed through the spin asymmetry for a lepton beam polarized normal to the scattering plane. We estimate this beam normal spin asymmetry at large momentum transfer using a parton model and we express the corresponding amplitude in terms ...