Wang, XiaobinXing, ZanbinKang, JiayinRaya, KhépaniChang, L.2023-03-272023-03-272022Wang, X., Xing, Z., Kang, J., Raya, K., & Chang, L. (2022). Pion scalar, vector, and tensor form factors from a contact interaction. In Physical Review D (Vol. 106, Issue 5). American Physical Society (APS). https://doi.org/10.1103/physrevd.106.0540161550-79981550-2368 (electrónico)https://hdl.handle.net/10272/21873The 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.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/journal article10.1103/physrevd.106.054016open access22 Física