Proton structure functions in the dipole picture of BFKL dynamics

Details Proton structure functions in the dipole picture of BFKL dynamics Proton structure functions in the dipole picture of BFKL dynamics

1996-05-24

arxiv.org/abs/hep-ph/9605389v1

Phys.Lett.B385:357-364,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, latex file, 4 figures

Scientific paper

10.1016/0370-2693(96)00889-1

The $F_2$, $F_G$, $R = F_L/F_T$ proton structure functions are derived in the QCD dipole picture. Assuming $k_T$ and renormalization-group factorization, we relate deep-inelastic proton scattering to deep-inelastic onium scattering. We get a three-parameter fit of the 1994 H1 data in the low-$x,$ moderate $Q^2$ range. The ratios $F_G/F_2$ and $R$ are predicted without further adjustment. The dipole picture of BFKL dynamics is shown to provide a relevant model for quantitatively describing the proton structure functions at HERA. The predictions for $F_2$ and $F_G$ are compatible with the next-to-leading order DGLAP analysis, while $R$ is expected to be significantly lower at very small $x$.

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