Saturation QCD predictions with heavy quarks at HERA

Details Saturation QCD predictions with heavy quarks at HERA Saturation QCD predictions with heavy quarks at HERA

2007-05-24

arxiv.org/abs/0705.3672v1

Phys.Lett.B655:32-38,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 5 figures

Scientific paper

10.1016/j.physletb.2007.07.076

The measurement of the proton structure function at HERA is often seen as a hint for the observation of saturation in high-energy QCD e.g. through the observation of geometric scaling. Accordingly, the dipole picture provides a powerful framework in which the QCD-based saturation models can be confronted to the data. In this paper, we give a parametrisation of proton structure function which is directly constrained by the dynamics of QCD in its high-energy limit and fully includes the heavy quark effects. We obtain a good agreement with the available data. Furthermore, to the contrary of various models in the literature, we do not observe a significant decrease of the saturation momentum due to the heavy quark inclusion.

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