Connections between lattice gauge theory and chiral perturbation theory [chapter]

M. Golterman
Chiral Dynamics: Theory and Experiment  
In this talk, I address the comparison between results from lattice QCD computations and Chiral Perturbation Theory (ChPT). I briefly discuss how ChPT can be adapted to the much-used quenched approximation and what it tells us about the special role of the $\eta'$ in the quenched theory. I then review lattice results for some quantities (the pion mass, pion scattering lengths and the $K^+\to\pi^+\pi^0$ matrix element) and what quenched ChPT has to say about them.
doi:10.1007/bfb0104897 fatcat:nwz2muszmbayzcrifisr42ygwa