Glueball Spectra from a Matrix Model of Pure Yang-Mills Theory
  We present variational estimates for the low-lying energies of a simple matrix model that approximates $SU(3)$ Yang-Mills theory on a three-sphere of radius $R$. By fixing the ground state energy, we obtain the (integrated) renormalization group (RG) equation for the Yang-Mills coupling $g$ as a function of $R$. This RG equation allows to estimate the masses of other glueball states, which we find to be in excellent agreement with lattice simulations. 
Nirmalendu Acharyya, A. P. Balachandran, Mahul Pandey, Sambuddha   Sanyal, Sachindeo Vaidya
hep-th hep-lat hep-ph