Saturation effects in deep inelastic scattering at low<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>Q</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>and its implications on diffraction

We present a model based on the concept of saturation for small ${Q}^{2}$ and small $x.$ With only three parameters we achieve a good description of all deep inelastic scattering data below $x=0.01.$ This includes a consistent treatment of charm and a successful extrapolation into the photoproduction regime. The same model leads to a roughly constant ratio of diffractive and inclusive cross section.

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