The order $p^8$ mesonic chiral Lagrangian

Johan Bijnens, Nils Hermansson-Truedsson, Si Wang

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 conta…