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摘要：By treating the light pseudo scalar mesons as dynamical effective degrees of freedom, chiral perturbation theory (ChPT) provides an effective tool to describe the strong interaction between hadrons. Here the intricate chiral dynamics of QCD is mapped onto a set of low-energy constants, where it is a challenge to derive the later from QCD directly. With the recent progress of numerical simulations of QCD in a finite volume lattice ensembles at different unphysical quark masses, may provide an opportunity to solving these problems. As an example, I will illustrate how to determine the LECs of open-charm mesonic chiral interactions by performing chiral extrapolations on ground-state open-charm meson masses given at different quark masses by lattice. I will discuss the possibility of dynamically generating higher resonances out of the coupled-channel chiral dynamics. I will further focus on the quark-mass dependence of the baryon octet and decuplet ground-state masses. We predict a first-order transition of the baryon masses by changing the quark masses. Such a phenomenon may lead to a interpretation of dark matter as exotic QCD matters. This possibility is explored by constructing a generalized Higgs potential with two degenerate minima.
