Topological Susceptibility and Zero Mode Size in Lattice QCD

In this proceedings, we summarize our work on the determination of the topological susceptibility and zero mode size distribution of SU(2) and SU(3) gauge fields using the overlap formalism. Most of this work has appeared in print [1]. We will focus here on new results which are extensions of the published work, namely the topological susceptibility for SU(2) pure gauge theory, the zero mode size distribution for both SU(2) and SU(3), and the density of zero eigenvalues ρ(0) for SU(2) and SU(3). A more detailed discussion of the role of the zero eigenvalue density can be found in the proceedings of the plenary talk given by Narayanan [2].