Speaker
Prof.
Colin Morningstar
(Carnegie Mellon University)
Description
The spectrum of excited isovector mesons is studied using a 32^3 x 256 anisotropic lattice with u,d quark masses set to give a pion mass near 240 MeV. Results in the bosonic isovector nonstrange symmetry channels of zero total momentum are presented using correlation matrices of unprecedented size. In addition to spatially-extended single meson operators, large numbers of two-meson operators are used, involving a wide variety of light isovector, isoscalar, and strange meson operators of varying relative momenta. All needed Wick contractions are efficiently evaluated using a stochastic method of treating the low-lying modes of quark propagation that exploits Laplacian Heaviside quark-field smearing. Level identification is discussed.
Primary author
Prof.
Colin Morningstar
(Carnegie Mellon University)
Co-authors
Brendan Fahy
(Carnegie Mellon University)
Dr
Chik-Him Wong
(University of California, San Diego)
Dr
David Lenkner
(Carnegie Mellon University)
Dr
John Bulava
(Trinity College, Dublin, Ireland)
Prof.
Keisuke Juge
(University of the Pacific, Stockton, CA)
Dr
You-Cyuan Jhang
(Carnegie Mellon University)
