Abstract
We derive the chiral Lagrangian at next-to-next-to-next-to-leading order (NNNLO) for a general number Nf of light quark flavours as well as for Nf = 2, 3. We enumerate the contact terms separately. We also discuss the cases where some of the external fields are not included. An example of a choice of Lagrangian is given in the supplementary material.
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Bijnens, J., Hermansson-Truedsson, N. & Wang, S. The order p8 mesonic chiral Lagrangian. J. High Energ. Phys. 2019, 102 (2019). https://doi.org/10.1007/JHEP01(2019)102
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DOI: https://doi.org/10.1007/JHEP01(2019)102