One of the biggest open puzzles of the Standard Model is the strong CP problem - the question of why the theta bar parameter in SM is tiny (<10^-10). The simplest explanation would be the presence of a massless (up)-quark, though this is disfavored by studies of meson mass spectra. However, there are dynamical effects contributing to the up-quark mass, which are very difficult to calculate using traditional methods. In this talk we estimate the magnitude of the dynamically generated up quark mass in a cousin of QCD obtained from perturbing supersymmetric QCD with small SUSY breaking, and examine the possibility of matching the observed meson spectra with a vanishing fundamental up quark mass, providing a novel perspective on this important issue.
