We present results for masses of light mesons obtained with the variational method using an enhanced basis of interpolating field operators with different quark smearings. The interpolators are constructed from Jacobi-smeared quarks of a Gaussian type as well as from derivative quark sources obtained by a covariant derivative acting on the Gaussian sources. For our analysis we use quenched gauge configurations with Chirally Improved quarks and the Luescher-Weisz gauge action on a 16^3 x 32 lattice with a = 0.148 fm. We discuss the influence of derivative sources on the overlap with excited states.
@article{arxiv.0709.4456,
title = {Meson spectroscopy with derivative quark sources},
author = {Christof Gattringer and Leonid Ya. Glozman and C. B. Lang and Daniel Mohler and Sasa Prelovsek},
journal= {arXiv preprint arXiv:0709.4456},
year = {2008}
}
Comments
7 pages, Presented at the XXV International Symposium on Lattice Field Theory, July 30 - August 4 2007, Regensburg, Germany