Tommy Burch

Excited hadrons on the lattice : Baryons

We present results for masses of excited baryons from a quenched calculation with Chirally Improved quarks at pion masses down to 350 MeV. Our analysis of the correlators is based on the variational method. In order to provide a large basis set for spanning the physical states, we use interpolators with different Dirac structures and Jacobi smeared quark sources of different width. Our spectroscopy results for a wide range of ground state and excited baryons are discussed.

A Lattice calculation of vector meson couplings to the vector and tensor currents using chirally improved fermions

We present a quenched lattice calculation of

Spatially improved operators for excited hadrons on the lattice

f_V^\perp/f_V

Lattice calculation of 1-+ hybrid mesons with improved Kogut-Susskind fermions

, the coupling of vector mesons to the tensor current normalized by the vector meson decay constant. The chirally improved lattice Dirac operator, which allows us to reach small quark masses, is used. We put emphasis on analyzing the quark mass dependence of

Topological susceptibility with the improved Asqtad action

f_V^\perp/f_V

Variational method for lattice spectroscopy with ghosts

and find only a rather weak dependence. Our results at the

Domain decomposition improvement of quark propagator estimation

\rho

Decay constants of charm and beauty pseudoscalar heavy–light mesons on fine lattices

and

Measurement of the hybrid content of heavy quarkonia using lattice nonrelativistic QCD

\phi

Exotic hybrid mesons from improved Kogut-Susskind fermions

masses agree well with QCD sum rule calculations and those from previous lattice studies.