Nonperturbative study of hadronization with heavy sources. II. Effects of flavor mutual screening in the two-species Schwinger model

We continue our study of the screening length $L_0$, the distance at which the interaction between heavy quarks begins to be screened as a result of light-quark pair production. We compute $L_0$ in the two-flavor Schwinger model and compare its mass dependence with the one-flavor case. Since the screening length is related to the binding energy of the dynamical fermions to the sources (heavy quarks), we use one-dimensional MIT bag ideas to discuss the effects of adding one more flavor to the problem. The results reported here have been obtained via a numerical simulation of the lattice Hamiltonian (ensemble projector Monte Carlo).