  Results are presented from a search for heavy, right-handed muon neutrinos,
N[mu], and right-handed W[R] bosons, which arise in the left-right symmetric
extensions of the standard model. The analysis is based on a 5.0 inverse
femtobarn sample of proton-proton collisions at a center-of-mass energy of 7
TeV, collected by the CMS detector at the Large Hadron Collider. No evidence is
observed for an excess of events over the standard model expectation. For
models with exact left-right symmetry, heavy right-handed neutrinos are
excluded at 95% confidence level for a range of neutrino masses below the W[R]
mass, dependent on the value of M(W[R]). The excluded region in the
two-dimensional (M(W[R]), M(N[mu])) mass plane extends to M(W[R]) = 2.5 TeV.
