Deeply Virtual Compton Scattering on a Photon and Generalized Parton Distributions in the Photon
arXiv:hep-ph/0611176 · doi:10.1016/j.physletb.2006.12.038
Abstract
We consider deeply virtual Compton scattering on a photon target, in the generalized Bjorken limit, at the Born order and in the leading logarithmic approximation. We interpret the result as a factorized amplitude of a hard process described by handbag diagrams and anomalous generalized parton distributions in the photon. This anomalous part, with its characteristic ln Q2 dependence, is present both in the DGLAP and in the ERBL regions. As a consequence, these generalized parton distributions of the photon obey DGLAP-ERBL evolution equations with an inhomogeneous term.
9 pages 3 figures. Version 2 to be published in Physics Letters B : more explanation and a few references added in the conclusion
References in corpus (16)
- Gauge-Invariant Decomposition of Nucleon Spin and Its Spin-Off
- Wave Functions, Evolution Equations and Evolution Kernels from Light-Ray Operators of QCD
- Generalized Parton Distributions
- Deeply Virtual Compton Scattering
- Nonforward Parton Distributions
- Probing partonic structure in gamma* gamma -> pi pi near threshold
- Exclusive production of pion pairs in gamma^* gamma collisions at large Q^2
- Crossing and Radon Tomography for Generalized Parton Distributions
- Theory of hard photoproduction
- Positivity Constraints for off-Forward Parton Distributions
- On the Evolution Kernels of Twist 2 Light-Ray Operators for Unpolarized and Polarized Deep Inelastic Scattering
- Positivity bounds on generalized parton distributions in impact parameter representation
- Hadron annihilation into two photons and backward dVCS in the scaling regime of QCD
- Disentangling positivity constraints for generalized parton distributions
- Impact Representation of Generalized Distribution Amplitudes
- Exclusive meson pair production in gamma* gamma scattering at small momentum transfer
Cited by in corpus (22)
- Forces inside hadrons: pressure, surface tension, mechanical radius, and all that
- Energy momentum tensor and the D-term in the bag model
- Generalized Parton Distributions: visions, basics, and realities
- Effects of long-range forces on the D-term and the energy-momentum structure
- Basis light-front quantization approach to photon
- A spectral representation for baryon to meson transition distribution amplitudes
- Analyticity and sum rules for photon GPDs
- Polynomiality sum rules for generalized parton distributions of spin-1 targets
- Diphoton Generalized Distribution Amplitudes
- Spatial densities of the photon on the light front
- Generalized Parton Distributions of the Photon with Helicity Flip
- Generalized Parton Distributions of the Photon in Position Space
- Generalized Parton Distributions of the Photon for Nonzero zeta
- Generalized Parton Distributions of the Photon
- Inverse Radon transform at work
- Photon Generalized Parton Distributions
- Anomalous GPDs in the photon
- On the universality of the fixed pole contribution in DVCS
- Hard exclusive processes with photons
- High energy DVCS on a photon and related meson exclusive production
- Covariance constraints for light front wave functions
- On the equivalence of GPD representations