The Donnachie-Landshoff pomeron and gauge invariance

Details The Donnachie-Landshoff pomeron and gauge invariance The Donnachie-Landshoff pomeron and gauge invariance

1998-03-10

arxiv.org/abs/hep-ph/9803296v1

Eur.Phys.J.C6:503-510,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages with 2 postscript figures

Scientific paper

10.1007/s100520050360

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 or of a vector meson. We propose a treatment of this problem which ensures a physical behaviour of cross sections in the photoproduction limit and show that it leads to results rather similar to those obtained from two-gluon exchange.

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