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arXiv · 2605.14875

Unified study of scalar, vector and tensor two-meson form factors in $U(3)$ resonance chiral theory

Jin Hao·Chun-Gui Duan·Zhi-Hui Guo·J. Oller·J. Ruiz de Elvira
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Abstract

We perform a systematic study of two-meson form factors of the scalar, vector, and anti-symmetric tensor types within the framework of the $U(3)$ resonance chiral theory. The complete perturbative form factors in both the strangeness-conserving and strangeness-changing channels are calculated by incorporating one-loop light-flavor pseudoscalar meson contributions and tree-level resonance exchanges. With these newly calculated chiral results, we construct the corresponding unitarized form factors by incorporating meson-meson final-state interactions. The parameter values obtained in previous meson-meson scattering studies are then exploited to predict the corresponding form factors. Different types of form factors are found to exhibit rather distinct resonance structures across channels.

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Jin Hao, Chun-Gui Duan, Zhi-Hui Guo, J. Oller, J. Ruiz de Elvira. 2026-05-14. Unified study of scalar, vector and tensor two-meson form factors in $U(3)$ resonance chiral theory. https://arxiv.org/abs/2605.14875

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