[en] A few examples of exclusive processes at high energies with the possibilities to measure them are discussed. Several mechanisms are presented and the differential distributions are shown.

No abstract available

[en] The review is given of applications of generalized parton distributions to hard exclusive processes.

[en] The study of exclusive channels at high energies may be as important as it was at lower energies. As an example current problems in Meson Spectroscopy are reviewed and experiments are suggested for higher energies

No abstract available

[en] Our earliest and most successful understanding of meson and baryon structure has been based on a model of constituent quarks moving in a phenomenological mean field which is supposed to represent the effects of complicated, but as yet uncalculated, gluonic interactions. Refinements to such models in terms of residual interactions such as color hyperfine interactions improve agreement with experimental spectroscopy. As momentum transfers increase this type of simple model becomes inadequate and one must search for additional degrees of freedom to account for the observed data. However, since these models are not fundamental, the pursuit to apply it to regions of ever increasing momentum transfer becomes fruitless. The constituent quarks themselves are the manifestations of a complexity of interacting valence quarks, sea quarks and gluons in the non-perturbative domain, and it is in terms of these fundamental entities which one must learn to describe mesons and baryons. The situation is analogous to that of the nucleus. A great deal of theoretical effort has gone into models involving constituent protons and neutrons, with interactions modeled in terms of meson fields. Thus, many of the low energy properties of nuclear matter are well described in terms of a mean field shell model, with residual perturbative nucleon-nucleon interactions. However, with increasing momentum transfer (resolution) the model becomes more complicated and eventually, as in the case of the baryon, less useful. A more fundamental approach requires the description of nuclear matter in terms of the variables of QCD in the non-perturbative domain. The fact that this may prove to be a very difficult task does not in any way diminish its importance

No abstract available

[en] The eg3 experiment at the Jefferson Lab CLAS detector aims to determine the existence of the Ξ₅ pentaquarks and investigate the excited Ξ states. Specifically, the exotic Ξ₅^-- pentaquark will be sought by first reconstructing the Ξ^- particle through its weak decays, Ξ^- → π^-Λ and Λ → π^-. A kinematic fitting routine was developed to reconstruct the detached vertices of these decays, where confidence level cuts on the fits are used to remove background events. Prior to fitting these decays, the exclusive reaction γD → ppπ^- was studied in order to correct the track measurements and covariance matrices of the charged particles. The Λ → pπ^- and Ξ^- → π^-Λ decays were then investigated to demonstrate that the kinematic fitting routine reconstructs the decaying particles and their detached vertices correctly

[en] It is pointed out that the large angle pp→pp data suggest an exponential behaviour in p(T) modulated by ssup(-N). It is argued that these effects are due to a manifestation of the same geometrical length scale R approximately equal to 1 fermi which is known to control small angle scattering

[en] It is shown that instantons can provide an explanation of the strong polarization transfer observed in exclusive hyperon photoproduction at JLab