Speaker: Norman Christ (Columbia University)

Title:
Domain Wall Fermions at Zero and Finite Temperature
			
Abstract:
Chiral fermions offer important advantages for lattice QCD.
For some applications such as the calculation of the Kaon
mixing parameter $B_K$ or the $\Delta S =1$ Kaon decay
amplitudes they are essential for a numerical approach with
adequately controlled errors.  For other topics such as
the determination of quark masses, pseudoscalar decay 
constants and the extraction of low energy constants from 
chiral perturbation theory they offer a simplified framework 
in which systematic errors can be discovered and controlled.
Finally by providing the physical compliment of chiral and
flavor symmetries, chiral fermions provide both an important
systematic check and the possibility to discover new behavior
in calculations of the QCD phase transition and the equation 
of state.  In this talk, recent work of the RBC and UKQCD 
collaborations in each of these areas will be presented.