Duality in semi-exclusive processes

Semi - Exclusive Processes : New Probes of Hadron Structure

We de ne and study hard \semi-exclusive" processes of the form A + B ! C + Y which are characterized by a large momentum transfer between the particles A and C and a large rapidity gap between the nal state particle C and the inclusive system Y . Such reactions are in e ect generalizations of deep inelastic lepton scattering, providing novel currents which probe speci c quark distributions of t...

0 ) - Renormalization Group for Many Particle Exclusive and Exclusive Semi - Inclusive Processes

In this paper it is shown that in QCD a new set of high energy processes are calculable. Firstly, many meson exclusive processes are shown to be control-lable. Secondly, a new type of exclusive semi-inclusive + meson process (for example e + e-+ ncone + anything, where II is unaccompanied in phase space) is shown to be controllable by renormalization group approach. Possible experimental confro...

Exclusive Processes in QCD

Exclusive and semi-exclusive processes, the diffractive dissociation of hadrons into jets, and hard diffractive processes such as vector meson leptoproduction provide new testing grounds for QCD and essential information on the structure of light-cone wavefunctions of hadrons, particularly the pion distribution amplitude. I review the basic features of the leading-twist QCD predictions and the ...

The KTH Visit in Semi-Markov Processes

Semi-exclusive DVCS

We consider Semi-Exclusive Deeply Virtual Compton Scattering, γp → γY (SECS), where Y is an inclusive state of intermediate mass, ΛQCD ≪ mY ≪ Q. When the photon is produced with a large transverse momentum k⊥ ∼ mY the subprocess is hard and the struck quark fragments independently of the target spectators. Using completeness this allows to express the SECS cross section in terms of ordinary par...