Lattice QCD with two dynamical flavors of domain wall fermions

We present results from the first large-scale study of two-flavor QCD using domain wall fermions (DWF), a chirally symmetric fermion formulation which has been proven to be very effective in the quenched approximation. We work on lattices of size 16(3)x32, with a lattice cutoff of a(-1)approximate to 1.7 GeV and dynamical (or sea) quark masses in the range m(strange)/2 less than or similar to m(sea)less than or similar to m(strange). After discussing the algorithmic and implementation issues involved in simulating dynamical DWF, we report on the low-lying hadron spectrum, decay constants, static quark potential, and the important kaon weak matrix element describing indirect CP violation in the standard model, B-K. In the latter case we include the effect of nondegenerate quark masses (m(s)not equal m(u)=m(d)), finding B-K((MS) over bar)(2 GeV)=0.495(18).