Model analysis of the world data on the pion transition form factor
Departamento de Fisica Teorica and Instituto de Física Corpuscular, Universidad de Valencia-CSIC, Burjassot, E-46100, Valencia, Spain
* e-mail: Santiago.Noguera@uv.es
Revised: 11 September 2012
Accepted: 4 October 2012
Published online: 23 October 2012
We discuss the impact of recent Belle data on our description of the pion transition form factor based on the assumption that a perturbative formalism and a nonperturbative one can be matched in a physically acceptable manner at a certain hadronic scale Q0. 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 Q2 nonperturbative description together with an additional 1/Q 2 term at the matching scale have a strong influence on the Q2 behavior up to very high values of Q2.
© SIF, Springer-Verlag Berlin Heidelberg, 2012