@article{10272/21873,
year = {2022},
url = {https://hdl.handle.net/10272/21873},
abstract = {The pion scalar, vector, and tensor form factors are calculated within a symmetry-preserving contact interaction model (CI) of quantum chromodynamics (QCD), encompassed within a Dyson-Schwinger and Bethe-Salpeter equations approach. In addition to the traditional rainbow-ladder truncation, a modified interaction kernel for the Bethe-Salpeter equation is adopted. The implemented kernel preserves the vector and axial-vector Ward-Takahashi identities, while also providing additional freedom. Consequently, new tensor structures are generated in the corresponding interaction vertices, shifting the location of the mass poles appearing in the quark-photon and quark tensor vertex and yielding a notorious improvement in the final results. Despite the simplicity of the CI, the computed form factors and radii are compatible with recent lattice QCD simulations.},
publisher = {American Physical Society},
title = {Pion scalar, vector, and tensor form factors from a contact interaction},
doi = {10.1103/physrevd.106.054016},
author = {Wang, Xiaobin and Xing, Zanbin and Kang, Jiayin and Raya, Khépani and Chang, L.},
}