Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-10-12
J.Exp.Theor.Phys. 81 (1995) 633-637; Zh.Eksp.Teor.Fiz. 108 (1995) 1155-1163
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 1 figure (request from kph154@zam001.zam.kfa-juelich.de), Juelich preprint KFA-IKP(Th)-1994-36
Scientific paper
We present a unified direct calculation of the triple-pomeron coupling $A_{3\Pom}(Q^{2})$ for diffractive real photoproduction ($Q^{2}=0$) and deep inelastic scattering at large $Q^{2}$ in the framework of the dipole approach to the generalized BFKL pomeron. The small phenomenological value of $A_{3\Pom}(0)\approx 0.16$\,GeV$^{2}$, which was a mystery, is related to the small correlation radius $R_{c}\approx 0.3$\,fm for the perturbative gluons. We confirm the early expectations of weak $Q^{2}$ dependence of the dimensionfull coupling $A_{3\Pom}(Q^{2})$ and predict that it rises by the factor $\sim 1.6$ from real photoproduction to deep inelastic scattering.
Genovese Marco
Nikolaev Nikolai N.
Zakharov Bronislav G.
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