Properties of ground and excited state hadrons from lattice QCD

Daniel Mohler 
TRIUMF, Canada

Over the years the determination of ground state hadron masses from
lattice QCD has continuously improved. While these states are a good
benchmark for lattice calculations, a large number of hadron excitations
are known and it would be desirable to calculate their properties from
first principles. This turns out to be a highly non-trivial task, as
excited states only contribute as sub-leading exponentials to Euclidean
correlation functions. In this talk I will briefly describe one possible
method for the calculation of excited state properties and present
results for light-quark mesons from simulations with Chirally Improved
fermions. For scalar mesons, both conventional quark-antiquark states as
well as a tetraquark interpretation will be considered. In addition, I
will present some (preliminary) results for baryon axial charges.