Topological susceptibility in QCD with two flavors and 3-5 colors -- a pilot study

Understand

I present a calculation of the topological susceptibility $\chi_T$ in $SU(N_c)$ gauge theory with $N_c=3-5$ colors and $N_f=2$ degenerate flavors of fermions.

• The results lie on a common curve when expressed in terms of the combination $N_c m_{PS}^2 t_0$ where $m_{PS}$ is the pseudoscalar meson mass and $t_0$ is the flow parameter.
• $\chi_T$ approaches its quenched value as the pseudoscalar mass becomes large.
• The lattice simulations use clover fermions.