2024
DOI: 10.1007/jhep08(2024)189
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Complete CP eigen-bases of mesonic chiral Lagrangian up to p8-order

Xuan-He Li,
Hao Sun,
Feng-Jie Tang
et al.

Abstract: Chiral perturbation theory systematically describes the low energy dynamics of meson and baryons using nonlinear Nambu-Goldstone fields. Using the Young tensor technique, we construct the pure mesonic effective operators up to p8-order, one-to-one corresponding to contact amplitudes with the on-shell Adler zero condition. The off-shell external sources, non-vanishing under equation-of-motion conditions, are also added to the operator bases. We also show the invariant tensor bases using the Young tableau is equ… Show more

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