出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：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 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.
