  We consider non-supersymmetric two-dimensional CP(N-1) model deformed by a
term presenting the bosonic part of the twisted mass deformation of N=2
supersymmetric version of the model. Our deformation has a special form
preserving a Z_N symmetry at the Lagrangian level. In the large mass limit the
model is weakly coupled. Its dynamics is described by the Higgs phase, with Z_N
spontaneously broken. At small masses it is in the strong coupling
Coulomb/confining phase. The Z_N symmetry is restored. Two phases are separated
by a phase transition. We find the phase transition point in the large-N limit.
It lies at strong coupling. As was expected, the phase transition is related to
broken versus unbroken Z_N symmetry in these two respective phases. The vacuum
energies for these phases are determined too.
