Comparing AdS/CFT Calculations to HERA F_2 Data
arXiv:0906.4197 · doi:10.1103/PhysRevD.80.074023
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.
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
References in corpus (16)
- The Pomeron and Gauge/String Duality
- NLO evolution of color dipoles
- Quark contribution to the small- evolution of color dipole
- Triumvirate of Running Couplings in Small-x Evolution
- Non-linear QCD meets data: A global analysis of lepton-proton scattering with running coupling BK evolution
- Solving The High Energy Evolution Equation Including Running Coupling Corrections
- Impact parameter dependent colour glass condensate dipole model
- Comparing the drag force on heavy quarks in N=4 super-Yang-Mills theory and QCD
- Particle multiplicities in Lead-Lead collisions at the LHC from non-linear evolution with running coupling
- Running coupling and power corrections in nonlinear evolution at the high--energy limit
- Saturation in Deep Inelastic Scattering from AdS/CFT
- Deep inelastic scattering off a N=4 SYM plasma at strong coupling
- DIS on a Large Nucleus in AdS/CFT
- Direct photons at forward rapidities in high-energy pp collisions
- Compatibility of phenomenological dipole cross sections with the Balitsky-Kovchegov equation
- Diffractive Vector Meson Photoproduction from Dual String Theory
Cited by in corpus (21)
- Analysis of combined HERA data in the Impact-Parameter dependent Saturation model
- Impact-parameter dependent Color Glass Condensate dipole model and new combined HERA data
- Heavy Ion Collisions with Transverse Dynamics from Evolving AdS Geometries
- Deeply Virtual Compton Scattering from Gauge/Gravity Duality
- Hadrons and direct photon in pp and pA collisions at LHC and saturation effects
- Vector meson production at low x from gauge/gravity duality
- Holographic Pomeron: Saturation and DIS
- Regge theory in a Holographic dual of QCD in the Veneziano Limit
- Unity of pomerons from gauge/string duality
- Nonforward Compton scattering in AdS/CFT correspondence
- Diffractive deep inelastic scattering in an AdS/CFT inspired model: A phenomenological study
- High--Energy Photon--Hadron Scattering in Holographic QCD
- R-Current DIS on a Shock Wave: Beyond the Eikonal Approximation
- Non-minimal coupling contribution to DIS at low in Holographic QCD
- Structure functions in deep inelastic scattering from gauge/string duality beyond single-hadron final states
- Nuclear Structure Functions at Low- in a Holographic Approach
- Vector meson dominance and deep inelastic scattering at low and medium Q squared
- Photonuclear interactions at very high energies and vector meson dominance
- Deeply Virtual Compton Scattering in Improved Holographic QCD
- Energy Dependent Growth of Nucleon and Inclusive Charged Hadron Distributions
- Gluon saturation effects at forward rapidities at LHC in pp collisions