paper

Transition form factors $Î³^Î³\toÎ·$ and $Î³^Î³\toÎ·'$ in QCD

arXiv:1409.4311 · doi:10.1103/PhysRevD.90.074019

Abstract

We update the theoretical framework for the QCD calculation of transition form factors $Î³^*Î³\toÎ·$ and $Î³^*Î³\toÎ·'$ at large photon virtualities including full next-to-leading order analysis of perturbative corrections, the charm quark contribution, and taking into account SU(3)-flavor breaking effects and the axial anomaly contributions to the power-suppressed twist-four distribution amplitudes. The numerical analysis of the existing experimental data is performed with these improvements.

23 pages, 6 figures

Transition form factors $Î³^*Î³\toÎ·$ and $Î³^*Î³\toÎ·'$ in QCD

Abstract

Transition form factors $Î³^Î³\toÎ·$ and $Î³^Î³\toÎ·'$ in QCD