Anomaly-induced dilaton-like corrections in the hard kernel significantly modify pion GFFs at large Q^{2} within a factorization approach using Sudakov resummation and a Gaussian TMD wave function.
Virtual Compton Scattering off the nucleon
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abstract
We review the recent developments of virtual Compton scattering. We focus on the kinematical regimes which look the most promising. The threshold regime gives access to the generalized polarizabilities of the proton. The hard scattering regime allows tests of perturbative QCD predictions and of the valence quark wave function. The Bjorken regime is closely related to deep inelastic scattering. It gives access to the off-forward parton distributions which generalize the ordinary parton distributions and may shed a new light on the spin problem. For each regime we discuss the experimental perspectives and the role of the Bethe-Heitler background.
fields
hep-ph 2years
2026 2verdicts
UNVERDICTED 2representative citing papers
The trace anomaly cancels in A_π(Q²) but dominates the TJJ contribution to the pion trace form factor in a Sudakov-improved QCD factorization calculation matched to lattice data.
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The Gravitational Form Factor of the Pion in Perturbative QCD with a Dilaton Interaction
Anomaly-induced dilaton-like corrections in the hard kernel significantly modify pion GFFs at large Q^{2} within a factorization approach using Sudakov resummation and a Gaussian TMD wave function.
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The Pion Gravitational Form Factors and the Trace Anomaly in QCD Factorization
The trace anomaly cancels in A_π(Q²) but dominates the TJJ contribution to the pion trace form factor in a Sudakov-improved QCD factorization calculation matched to lattice data.