  We make progress towards a derivation of a low energy effective theory for
SU(2) Yang-Mills theory. This low energy action is computed to 1-loop using the
renormalization group technique, taking proper care of the Slavnov-Taylor
identities in the Maximal Abelian Gauge. After that, we perform the Spin-Charge
decomposition in a way proposed by L.D. Faddeev and A.J. Niemi. The resulting
action describes a pair of non-linear O(3) nonlinear sigma models interacting
with a scalar field. The potential of the scalar field is a Mexican hat and the
location of the minima sets the energy scale of solitonic configurations of the
sigma model fields whose excitations correspond to glueball states.
