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Comparing AdS/CFT Calculations to HERA F_2 Data
- Source :
- Phys.Rev.D80:074023,2009
- Publication Year :
- 2009
-
Abstract
- We show that HERA data for the inclusive structure function F_2(x,Q^2) at small Bjorken-x and Q^2 can be reasonably well described by a color-dipole model with an AdS/CFT-inspired dipole-proton cross section. The model contains only three free parameters fitted to data. In our AdS/CFT-based parameterization the saturation scale varies in the range of 1-3 GeV becoming independent of energy/Bjorken-x at very small x. This leads to the prediction of x-independence of the F_2 and F_L structure functions at very small x. We provide predictions for F_2 and F_L in the kinematic regions of future experiments. We discuss the limitations of our approach and its applicability region, and argue that our AdS/CFT-based model of non-perturbative physics could be viewed as complimentary to the perturbative description of data based on saturation/Color Glass Condensate physics.<br />Comment: 23 pages, 10 figures; v3: new plots added showing our model predictions for charm and longitudinal structure functions and photoproduction cross-section, discussion extended. The version to appear in PRD
Details
- Database :
- arXiv
- Journal :
- Phys.Rev.D80:074023,2009
- Publication Type :
- Report
- Accession number :
- edsarx.0906.4197
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevD.80.074023