Deeply virtual Compton scattering via color dipoles: Nonperturbative effects

2008/12/29 by B. Z. Kopeliovich, Iván Schmidt, Ivan Schmidt +2 · 10 citations
Physics and Astronomy · #Amplitude #Atomic physics #Compton scattering #Cross section (physics) #Dipole #High-Energy Particle Collisions Research #Inelastic scattering #Nuclear physics #Optics #Particle physics theoretical and experimental studies #Photon #Physics #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quantum mechanics #Scattering #Scattering amplitude #Virtual particle #hep-ph

paper · pdf · doi:10.1103/physrevd.79.034019

published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 79(3) (American Physical Society) · 11 pages; references added, bibliographic inaccuracy corrected

arxiv created 2008/12/29 · openalex publication_date 2009/02/19 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We study the deeply virtual Compton scattering amplitude within the color dipole approach. The light-cone wave function of a real photon is evaluated in the instanton vacuum model. Our parameter-free calculations are able to describe H1 data, both the absolute values and the t dependences, at medium-high values of Q². The Q² dependence is found to be sensitive to the choice of the phenomenological cross section fitted to deep-inelastic scattering data.

Citations

• Generalized parton distributions
• Low energy constants ofχPTfrom the instanton vacuum model
• Impact parameter dipole saturation model
• Vector and axial-vector correlators in a non-local chiral quark model
• Instantons in QCD
• Saturation effects in deep inelastic scattering at lowQ2and its implications on diffraction
• Exclusive diffractive processes at HERA within the dipole picture