Evolution of high-mass diffraction from the light quark valence component of the pomeron

Abstract

We analyze the contribution from excitation of the $(q\bar{q})(f\bar{f}),(q\bar{q})g_1...g_n(f\bar{f})$ Fock states of the photon to high mass diffraction in DIS. We show that the large $Q^2$ behavior of this contribution can be described by the DLLA evolution from the non-perturbative $f\bar{f}$ valence state of the pomeron. Although of higher order in pQCD, the new contribution to high-mass diffraction is comparable to that from the excitation of the $q\bar{q}g$ Fock state of the photon.

12 pages, 2 figures, the oublished version. The slight numerical errors corrected, all conclusions are retained

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