Abstract
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.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear and High Energy Physics
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