We study Yang-Mills lattice theories with Sp(Nc) gauge group, with Nc = 2N , for N = 1, • • • , 4. We show that if we divide the renormalised couplings appearing in the Wilson flow by the quadratic Casimir C2(F ) of the Sp(Nc) group, then the resulting quantities display a good agreement among all values of Nc considered, over a finite interval in flow time. We use this scaled version of the Wilson flow as a scale-setting procedure, compute the topological susceptibility of the Sp(Nc) theories, and extrapolate the results to the continuum limit for each Nc.
ContentsA. Scale setting data for N c = 2, 4, 8