Estimate for the $0^{++}$ glueball mass in QCD
  We obtain accurate result for the lightest glueball mass of QCD in 3 dimensions from lattice Hamiltonian field theory. Using the dimensional reduction argument, a good approximation for confining theories, we suggest that the $0^{++}$ glueball mass in 3+1 dimensional QCD be about $1.71$ GeV. 
Xiang-Qian Luo, and Qi-Zhou Chen