Abstract

An explicit model for the proton structure function is suggested, interpolating between low-\(Q^2\) vector meson dominance and Regge behavior, on the one hand, and the high-\(Q^2\) solution of the Gribov-Lipatov-Altarelli-Parisi evolution equation, on the other hand. The model is fitted to the experimental data in a wide range of the kinematical variables with emphasis on the low-x HERA data. The boundaries, transition region and interface between various regimes are quantified.

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