[hep-ph/0002100] The Pomeron as a Finite Sum of Gluon Ladder

High Energy Physics - Phenomenology, abstract

From: Alessandro Papa <papa@cs.infn.it>

Date: Wed, 9 Feb 2000 09:47:32 GMT (27kb)

The Pomeron as a Finite Sum of Gluon Ladder

Authors: R. Fiore , L.L. Jenkovszky , A. Lengyel , F. Paccanoni , A. Papa
Comments: 15 pages, LaTeX, 2 EPS figures, uses epsf.sty and axodraw.sty
Report-no: DFPD 00/TH/08, UNICAL-TH 00/1, BITP-00-05E
A model for the Pomeron at t=0 is suggested. It is based on the idea of a finite sum of ladder diagrams in QCD. Accordingly, the number of s-channel gluon rungs and correspondingly the powers of logarithms in the forward scattering amplitude depends on the phase space (energy) available, i.e. as energy increases, progressively new prongs with additional gluon rungs in the s-channel open. Explicit expressions for the total cross section involving two and three rungs or, alternatively, three and four prongs (with $\ln^2(s)$ and $\ln^3(s)$ as highest terms) is fitted to the proton-proton and proton-antiproton total cross section data in the accelerator region.

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