  A search is presented for a Higgs-like boson with mass in the range 45 to 195
GeV/$c^2$ decaying into a muon and a tau lepton. The dataset consists of
proton-proton interactions at a centre-of-mass energy of 8 TeV, collected by
the LHCb experiment, corresponding to an integrated luminosity of 2 fb$^{-1}$.
The tau leptons are reconstructed in both leptonic and hadronic decay channels.
An upper limit on the production cross-section multiplied by the branching
fraction at 95% confidence level is set and ranges from 22 pb for a boson mass
of 45 GeV/$c^2$ to 4 pb for a mass of 195 GeV/$c^2$.
