1205.4598 (Santiago Noguera et al.)

The pion transition form factor revisited    [PDF]

Santiago Noguera, Vicente Vento

We discuss the impact of recent Belle data on our description of the pion transition form factor based on the philosophy that a perturbative formalism and a nonperturbative one can be matched in a physically acceptable manner at acertain hadronic scale $Q_{0}$. We discuss the implications of the different parameters of the model in comparing with world data and conclude that within experimental errors our description remains valid. Thus we can assert that the low $Q^2$ nonperturbative description and higher twist effects at the matching scale have a strong impact on the $Q^2$ behavior up to very high values of $Q^2$ .

View original: http://arxiv.org/abs/1205.4598