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Meson spectroscopy with derivative quark sources

Presenter: Daniel Mohler — Karl-Franzens-Universität Graz

Christof Gattringer, Leonid Ya. Glozman, C. B. Lang, Daniel Mohler, Sasa Prelovsek

We present results for masses of light and strange mesons obtained with the variational method using an enhanced basis of correlators with different quark smearings. The interpolators are constructed from Jacobi-smeared quarks of a Gaussian type as well as interpolators with so-called derivative quark sources obtained by a covariant derivative acting on the Gaussian type sources. For our analysis we use quenched gauge configurations with chirally improved quarks and the Lüscher-Weisz gauge action on a 163× 32 lattice with a=0.148fm. We discuss the influence of derivative sources on the overlap with excited states.