Resonance properties from lattice energy levels using chiral effective field theory

Abstract

We use the chiral effective field theory to study the lattice finite-volume energy levels from the meson-meson scattering. The hadron resonance properties and the scattering amplitudes at physical masses are determined from the lattice energy levels calculated at unphysically large pion masses. The results from the $\pi \eta ,K\bar{K}$ and $\pi {\eta }^{\prime }$ coupled-channel scattering and the $a_0(980)$ resonance are explicitly given as a concrete example.

Comments: 7 pages, 4 figures. Proceedings for Lattice 2018