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

URN to cite this document:: urn:nbn:de:bvb:355-epub-517366
DOI to cite this document:: 10.5283/epub.51736

Braun, V. M. ; Manashov, A. N. ; Moch, S. ; Schönleber, J.

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Date of publication of this fulltext: 20 Feb 2022 14:04

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Abstract

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 ...