Wu, J.-J.Lee, T.-S.Thomas, A.Young, R.2015-11-032015-11-032014Physical Review C: Nuclear Physics, 2014; 90(5):055206-1-055206-140556-28131089-490Xhttp://hdl.handle.net/2440/96081Within a multichannel formulation of ππ scattering, we investigate the use of the finite-volume Hamiltonian approach to resolve scattering observables from lattice QCD spectra. The asymptotic matching of the well-known L¨uscher formalism encodes a unique finite-volume spectrum. Nevertheless, in many practical situations, such as coupled-channels systems, it is advantageous to interpolate isolated lattice spectra in order to extract physical scattering parameters. Here we study the use of the Hamiltonian framework as a parametrization that can be fit directly to lattice spectra. We find that, with a modest amount of lattice data, the scattering parameters can be reproduced rather well, with only a minor degree of model dependence.en© 2014 American Physical SocietyJournal article003001588910.1103/PhysRevC.90.0552060003487669000062-s2.0-84911403152159228Thomas, A. [0000-0003-0026-499X]Young, R. [0000-0002-4527-1811]