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.
Soviet Journal of Experimental and Theoretical Physics Letters
- Pub Date:
- September 2004
- High Energy Physics - Phenomenology
- 12 pages, 2 figures, the oublished version. The slight numerical errors corrected, all conclusions are retained