The sphaleron energy for SU(2)-Higgs from cooling
  The cooling algorithm for saddle points presented in ref. [1] is generalized to obtain static classical solutions of the SU(2)-Higgs field theory in the limit of infinite Higgs self-coupling. The sphaleron energy obtained via this algorithm is ${\cal E}_{\rm sph}= 5.08(7)\,M_W/\alpha_W$ to be compared with 5.0707 obtained in the variational approach [2]. 
Margarita Garcia Perez and Pierre van Baal