Numerical estiamtes for the spectrum of quantum chromodynamics

Abstract

We present estimates for the hadron masses in lattice QCD obtained in the approximation of neglecting dynamic-fermion loops. Both light- and heavy-quark systems are considered and their dependence on the coupling constant and the quark mass is studied. Some results for the decay amplitudes are also given. We discuss how the ${\eta }^{\prime }$ mass can be computed to lowest order in $n_f$, the number of dynamic fermion flavors.