# Extension of the chiral perturbation theory meson Lagrangian to order p6.

@article{Fearing1994ExtensionOT, title={Extension of the chiral perturbation theory meson Lagrangian to order p6.}, author={Fearing and Scherer}, journal={Physical review. D, Particles and fields}, year={1994}, volume={53 1}, pages={ 315-348 } }

We have constructed the most general chirally invariant Lagrangian {ital scrL}{sub 6} for the meson sector at order {ital p}{sup 6}. The result provides an extension of the standard Gasser-Leutwyler Lagrangian {ital scrL}{sub 4} to one higher order, including as well all the odd intrinsic parity terms in the Lagrangian. The most difficult part of the construction was developing a systematic strategy so as to get all of the independent terms and eliminate the redundant ones in an efficient way…

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