RT Journal Article
T1 Pion scalar, vector, and tensor form factors from a contact interaction
A1 Wang, Xiaobin
A1 Xing, Zanbin
A1 Kang, Jiayin
A1 Raya, Khépani
A1 Chang, L.
AB 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.
PB American Physical Society
SN 1550-7998
SN 1550-2368 (electrónico)
YR 2022
FD 2022
LK https://hdl.handle.net/10272/21873
UL https://hdl.handle.net/10272/21873
LA eng
NO Wang, 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.106.054016
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026