Natural TeV-scale left-right seesaw mechanism for neutrinos and experimental tests

We present a TeV-scale left-right ultraviolet completion of the type-I seesaw for neutrino masses based on the SU(2)_L×SU(2) _R×U(1)_B-L gauge group without parity, which leads to "large" light-heavy neutrino mixing while keeping the neutrino masses small in a natural manner guaranteed by discrete symmetries. We point out specific observable implications of this class of models if the SU(2) _R-breaking scale is of order 5 TeV, in searches for lepton flavor violating processes such as μ→eγ, μ→3e and μ→e conversion in nuclei, and lepton number violating processes such as neutrinoless double beta decay as well as at the LHC. In particular, if the upper limit on BR(μ→eγ) improves by 1 order of magnitude, a large range of the parameters of the model would be ruled out.