New Quasidilaton theory in Partially Constrained Vielbein Formalism
  In this work we study the partially constrained vielbein formulation of the
new quasidilaton theory of massive gravity which couples to both physical and
fiducial metrics simultaneously via a composite effective metric. This
formalism improves the new quasidilaton model since the Boulware-Deser ghost is
removed fully non-linearly at all scales. This also yields crucial implications
in the cosmological applications. We derive the governing cosmological
background evolution and study the stability of the attractor solution.
