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hep-th2022★ 11 cited
Hilbert series and higher-order Lagrangians for the model
Johan Bijnens, Sven Bjarke Gudnason, Jiahui Yu +1
We compare the Hilbert series approach with explicit constructions of higher-order Lagrangians for the nonlinear sigma model. We use the Hilbert series to find the number an…
hep-th2019★ 16 cited
Higher-order tree-level amplitudes in the nonlinear sigma model
Johan Bijnens, Karol Kampf, Mattias Sjö
We present a generalisation of the flavour-ordering method applied to the chiral nonlinear sigma model with any number of flavours. We use an extended Lagrangian with terms contain…