Kπ scattering and excited meson spectroscopy using the stochastic LapH method

• DOI: 10.48550/arxiv.1810.11311
• Publication Date: 2019-05-29
• Authors: Brett, Ruairí; Bulava, John; Fallica, Jacob; Hanlon, Andrew; Hörz, Ben; Morningstar, Colin
• Keywords: High Energy Physics - Lattice; High Energy Physics - Lattice (hep-lat); FOS: Physical sciences; 7. Clean energy

Elastic $I=1/2$, $s$- and $p$-wave $K��$ scattering amplitudes are simultaneously calculated using a L��scher style analysis on a single ensemble of dynamical Wilson-clover fermions at $m_��\sim 230$ MeV. Partial wave mixing due to the reduced rotational symmetries of the finite volume is included up to $\ell=2$. We also present finite-volume QCD spectra on two large anisotropic lattices ($32^3 \times 256$, $24^3 \times 128$) with $m_��\sim 230,\ 390$ MeV respectively. In each symmetry channel, a large basis of one- and two-hadron interpolating operators is employed with all-to-all quark propagation treated using the stochastic LapH method.<br/>7 pages, proceedings for the 36th International Symposium on Lattice Field Theory (22-28 July 2018); references updated<br/>