The finite volume spectrum of excited states from lattice QCD simulations

Abstract

We present results for the spectrum of excited mesons obtained from temporal correlations of spatially-extended single-hadron and multi-hadron operators computed in lattice QCD. The stochastic LapH algorithm is implemented on anisotropic, dynamical lattices for isovectors for pions of mass $390$ MeV. A large correlation matrix with single-particle and two-particle probe operators is diagonalized to identify resonances. The masses of excited states in the $I=1,S=0,T_{1u}^{+}$ channel as well as the mixing of single and multi-particle probe operators are presented.

Comments: 6 pages, 4 figures, in Proceedings of Hadron '13