Patrick Bowman
CSSM
Tuesday, April 29, 3.30pm
4th Floor, CSSM
Infrared and Ultraviolet Properties of the Quark Propagator from Overlap and Improved Staggered Actions
Abstract:
The quark propagator is one of the building blocks of QCD and the only known method to calculate it from first principles in lattice gauge theory. Although it is not observable, the quark propagator provides a connection between lattice QCD and perturbation theory, as well as many hadron models. The calculation of gauge dependent objects continues to be an area of fruitful overlap between lattice and Dyson-Schwinger studies. I will present results with Overlap and Improved Staggered quarks, both of which produce propagators that are well behaved in the ultraviolet, where lattice calculations are weakest. This enables us to make estimates of the chiral condensate and the running quark mass.