Examination of the Gunion-Bertsch formula for soft gluon radiation
  The spectrum of emitted gluons from the process g+g -> g+g+g has been evaluated by relaxing some of the approximations used in earlier works. The difference in the results from earlier calculations have been pointed out. The formula obtained in the present work has been applied to estimate physical quantities like equilibration rate of gluons and the energy loss of fast gluon in the gluonic plasma. 
Trambak Bhattacharyya, Surasree Mazumder, Santosh K Das and Jan-e Alam
nucl-th hep-ph