[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Monday, March 22, 2010
1:00 p.m.
CEBAF Center, Room L104
Coffee at 12:45 p.m.

*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.

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