Pion transition form factor through Dyson-Schwinger equations

30th Annual Meeting of the Division of Particles and Fields (DPyC) of the Mexican Physical Society

Raya, Khépani^1

Instituto de Fisica y Matemáticas, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, Edificio C-3, Michoacán, Morelia

C.P. 58040, Mexico^1

关键词: Electromagnetic form factors;    Form factors;    Parton distributions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/761/1/012039/pdf
DOI  :  10.1088/1742-6596/761/1/012039

来源: IOP

【 摘 要 】

In the framework of Dyson-Schwinger equations (DSE), we compute the γ∗γ→π0transition form factor, G(Q2). For the first time, in a continuum approach to quantun chromodynamics (QCD), it was possible to compute G(Q2) on the whole domain of space-like momenta. Our result agrees with CELLO, CLEO and Belle collaborations and, with the well- known asymptotic QCD limit, 2π. Our analysis unifies this prediction with that of the pion's valence-quark parton distribution amplitude (PDA) and elastic electromagnetic form factor.