Eur. Phys. J. A (2012) 48: 143
https://doi.org/10.1140/epja/i2012-12143-1

Letter

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

Received: 5 July 2012
Revised: 11 September 2012
Accepted: 4 October 2012
Published online: 23 October 2012

Abstract

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.