RT Journal Article
T1 Contact interaction treatment of V → Pγ for light-quark mesons
A1 Xu, Yehan
A1 Sultan, M. Atif
A1 Raya, Khépani
A1 Chang, Lei
AB The V→Pγ and η(η′)→γγ decays are evaluated within a Dyson-Schwinger and Bethe-Salpeter equations framework (here V={ρ±,K⋆±,ϕ} and P={π±,K±,η,η′}). The so-called impulse approximation (IA) is employed in the computation of the decay constants involved and decay widths, and so in the estimation of the associated charge and interaction radii. For their part, the required propagators and vertices stem from a contact interaction model, embedded within a beyond rainbow-ladder (RL) truncation that accounts for the typical ladder exchanges, quark anomalous magnetic moment, as well as the non-Abelian anomaly. While the examined transitions produce decay widths plainly compatible with the available experimental data, those processes involving the η-η′ mesons highlight the incompleteness of the IA when considering beyond RL effects in the interaction kernels.
PB American Physical Society (APS)
SN 2470-0010
SN 2470-0029 (electrónico)
YR 2024
FD 2024-11
LK https://hdl.handle.net/10272/25052
UL https://hdl.handle.net/10272/25052
LA eng
NO Xu, Y., Sultan, M. A., Raya, K., & Chang, L. (2024). Contact interaction treatment of V → Pγ for light-quark mesons. In Physical Review D (Vol. 110, Issue 9). American Physical Society (APS). https://doi.org/10.1103/physrevd.110.094036
NO We acknowledges valuable discussions with HaoDang and Zanbin Xing. This work was supported byNational Natural Science Foundation of China (GrantNo. 12135007). This work has also been partially fundedby Ministerio Español de Ciencia e Innovación under GrantNo. PID2019–107844 GB-C22; Junta de Andalucía underContracts No. Operativo FEDER Andalucía 2014-2020UHU-1264517, No. P18-FR-5057, and also No. PAIDIFQM-370.
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026