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Exclusive electroproduction and off-diagonal parton distributions
M. Diehl, T. Gousset, B. Pire
Off-diagonal parton distributions occur in several hard exclusive reactions. They extend the study of hadron structure beyond what can be learned from ordinary distributions and ha…
Exclusive electroproduction of vector mesons and transversity distributions
Markus Diehl, Thierry Gousset, Bernard Pire
We show that the leading twist contribution to exclusive electroproduction of transversely polarized vector mesons vanishes at all orders in perturbation theory. Therefore one cann…
Non-diagonal parton distribution functions
M. Diehl, T. Gousset
We explain why the time ordering in the definition of non-diagonal parton distributions can be omitted and discuss the physics implications.
The Donnachie-Landshoff pomeron and gauge invariance
M. Diehl
The pomeron model of Donnachie and Landshoff does not conserve the electromagnetic current when applied to diffractive reactions such as electroproduction of a quark-antiquark pair…