Finite-tand Target-Mass Corrections to Deeply Virtual Compton Scattering

2012/09/12 by V. M. Braun, A. N. Manashov, B. Pirnay
Physics and Astronomy · #Compton scattering #Helicity #High-Energy Particle Collisions Research #Kinematics #Momentum (technical analysis) #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Scattering #hep-ph

paper · pdf · doi:10.1103/physrevlett.109.242001

published as Phys.Rev.Lett. 109 (2012) 242001 · 4 pages, 4 figures

arxiv created 2012/09/12 · openalex publication_date 2012/12/10 · arxiv updated 2014/10/21 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We carry out the first complete calculation of kinematic power corrections ~t/Q(2) and ~m(2)/Q(2) to the helicity amplitudes of deeply virtual Compton scattering. This result removes an important source of uncertainties in the quantum chromodynamics predictions for intermediate momentum transfers Q(2) ~ 1-10 GeV(2) that are accessible in the existing and planned experiments. In particular, the finite-t corrections are significant and must be taken into account in the data analysis.

Citations

• Generalized parton distributions
• DVCS on the nucleon to the twist-3 accuracy
• Target-mass and finite t corrections to diffractive deep-inelastic scattering
• Renormalization of twist-four operators in QCD
• Target mass corrections for virtual Compton scattering at twist-2 and generalized, nonforward Wandzura–Wilczek and Callan–Gross relations
• On the structure of the virtual Compton amplitude in the generalized Bjorken region: integral relations
• Wandzura–Wilczek approximation for the twist-3 DVCS amplitude
• NNLO global parton analysis
• Finite-tand target mass corrections to deeply virtual Compton scattering on a scalar target