Geometric Scaling for the Total γ*p Cross Section in the Low x Region
Abstract
We observe that the saturation model of deep inelastic scattering predicts a geometric scaling of the total γ*p cross section in the region of small Bjorken variable x. The geometric scaling in this case means that the cross section is a function of only one dimensionless variable τ = Q2R20\(x\), where the function R0\(x\) decreases with decreasing x. We show that the experimental data from HERA in the region x<0.01 confirm the expectations of this scaling over a very broad region of Q2. We suggest that the geometric scaling is more general than the saturation model.
- Publication:
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Physical Review Letters
- Pub Date:
- January 2001
- DOI:
- 10.1103/PhysRevLett.86.596
- arXiv:
- arXiv:hep-ph/0007192
- Bibcode:
- 2001PhRvL..86..596S
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- 12 pages, 4 figures, LaTeX, revised version to appear in journal. 1 new figure, several new references added, extended discussion on saturation radius