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Axial-vector contributions in two-photon reactions: Pion transition form factor and deeply-virtual Compton scattering at NNLO in QCD

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DOI to cite this document:
Braun, V. M. ; Manashov, A. N. ; Moch, S. ; Schönleber, J.
License: Creative Commons Attribution 4.0
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Date of publication of this fulltext: 20 Feb 2022 14:04


Using the approach based on conformal symmetry we calculate the two-loop coefficient function for the axial-vector contributions to two-photon processes in the (MS) over bar scheme. This is the last missing element for the complete next-to-next-to-leading order (NNLO) calculation of the pion transition form factor gamma*gamma -> pi in perturbative QCD. The corresponding high-statistics ...


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