Towards a fitting procedure for deeply virtual Compton scattering at next-to-leading order and beyond
作者： K. Kumerički , D. Müller , K. Passek-Kumerički
DOI: 10.1016/J.NUCLPHYSB.2007.10.029
关键词: Conformal map 、 Observable 、 Theoretical physics 、 Physics 、 Quantum electrodynamics 、 Quantum chromodynamics 、 Minimal subtraction scheme 、 Compton scattering 、 Parton 、 Conformal symmetry 、 Operator product expansion
摘要: Abstract Combining dispersion and operator product expansion techniques, we derive the conformal partial wave decomposition of virtual Compton scattering amplitude in terms complex spin to twist-two accuracy. The perturbation theory predictions for deeply (DVCS) are presented next-to-leading order both modified minimal subtraction scheme. Within a scheme, where exploit predictive power symmetry, radiative corrections up next-to-next-to-leading Here, because trace anomaly, mixing moments generalized parton distributions (GPD) at three-loop level remains unknown. new proposed parameterization GPDs, then study convergence demonstrate that our formalism is suitable fitting procedure DVCS observables.
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