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Polarisation in deeply virtual meson production
M. Diehl, T. Gousset, B. Pire
We discuss two aspects of polarisation in hard exclusive meson production: the leading-twist selection rule for the meson helicity, and the different partial waves of a (pi pi)-pai…
Hard exclusive and semi-exclusive meson production
M. Diehl
I review recent theory developments for hard exclusive and semi-exclusive production of mesons, emphasising the variety of physics issues that can be studied in these processes.
Diffractive Interactions: Theory Summary
M. Diehl
I review various theory issues in diffraction that have been presented and discussed in the working group on diffractive interactions, and a few points concerning the comparison of…
QCD factorization in gamma* gamma -> pi pi and gamma* N -> pi pi N
M. Diehl, T. Gousset, B. Pire +1
Exclusive two-pion production near threshold in the collision of a highly virtual photon with a real one offers a new possibility to unravel the partonic content of hadrons. We exp…