Low-x scaling in $γ^*p$ total cross sections

Details Low-x scaling in $γ^*p$ total cross sections Low-x scaling in $γ^*p$ total cross sections

2000-10-04

arxiv.org/abs/hep-ph/0010030v2

Phys.Lett. B499 (2001) 116-124

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 14 pages, 4 figures, Title changed, final version published in Phys.Lett

Scientific paper

10.1016/S0370-2693(00)01397-6

We show that the experimental data for the total virtual-photon proton cross section, \sigma_{\gamma^*p} (W^2, Q^2), for x_{bj} \lsim 0.1 lie on a universal curve, when plotted against \eta = (Q^2 + m^2_0)/ \Lambda^2(W^2), where \Lambda^2 (W^2) = C_1 (W^2+W^2_0)^{C_2} is determined by the parameters m^2_0, C_1, C_2 and W^2_0. The observed scaling law follows from the generalized-vector-dominance/color-dipole picture of low-x deep inelastic scattering.

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