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arXiv · 1810.06834

The order $p^8$ mesonic chiral Lagrangian

Johan Bijnens·Nils Hermansson-Truedsson·Si Wang
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Abstract

We derive the chiral Lagrangian at next-to-next-to-next-to-leading order (NNNLO) for a general number $N_f$ of light quark flavours as well as for $N_f=2,3$. 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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Johan Bijnens, Nils Hermansson-Truedsson, Si Wang. 2018-10-16. The order $p^8$ mesonic chiral Lagrangian. https://doi.org/10.1007/jhep01(2019)102

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