  The QCD evolution of transverse momentum dependent (TMD) distribution
functions has recently been formulated in a parton branching (PB) formalism. In
this approach, soft-gluon coherence effects are taken into account by
introducing the soft-gluon resolution scale and exploiting the relation between
transverse-momentum recoils and branching scales. In this work we investigate
the implications of dynamical, i.e., branching scale dependent, resolution
scales. We present both analytical studies and numerical solution of PB
evolution equations in the presence of dynamical resolution scales. We use this
to compare PB results with other approaches in the literature, and to analyze
predictions for transverse momentum distributions in $Z$-boson production at
the Large Hadron Collider (LHC).
