2001/09/19 by D. Schildknecht, Schildknecht, D.
Computer Science · Mathematics · Physics and Astronomy · #Advanced Mathematical Modeling in Engineering #Nonlinear Partial Differential Equations #Spectral Theory in Mathematical Physics #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0109171
8 pages, Latex using psfig, 5 figures, documentclass elsart. Presented at IX Blois Workshop on Elastic and Diffractive Scattering, Pruhonice near Prague, Czech Republic, June 9-15, 2001
arxiv created 2001/09/19 · arxiv updated 2009/11/30
The scaling in σγ^*p cross sections (for Q2/W2 << 1) in terms of the scaling variable η= (Q2 + m20)/Λ2 (W2) is interpreted in the generalized vector dominance/color-dipole picture (GVD/CDP). The quantity Λ2 (W2) is identified as the average gluon transverse momentum absorbed by the q q state, < l~2> = (1/6) Λ2 (W2). At any Q2, for W2 → ∞, the cross sections for virtual and real photons become universal, σγ^*p(W2,Q2)/σγp(W2) → 1. The gluon density corresponding to the color-dipole cross section in the appropriate limit is found to be consistent with the results from QCD fits.