Eur. Phys. J. C (2009) 63: 287-296
https://doi.org/10.1140/epjc/s10052-009-1102-3

Regular Article - Theoretical Physics

Pomeron loops in the perturbative QCD with large N _c

Department of High Energy Physics, University of St. Petersburg, 198904, St. Petersburg, Russia

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Received: 28 January 2009
Revised: 1 June 2009
Accepted: 1 June 2009
Published online: 29 July 2009

Abstract

The lowest order pomeron loop is calculated for the leading conformal weight with full dependence of the triple-pomeron vertex on intermediate conformal weights. The loop is found to be convergent. Its contribution to the pomeron Green function begins to dominate already at rapidities 10–15. The pomeron pole renormalization is found to be quite small due to a rapid fall of the triple-pomeron vertex with rising conformal weights.