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We present a TeV-scale left-right ultraviolet completion of type-I seesaw forneutrino masses based on the $SU(2)_L\times SU(2)_R\times U(1)_{B-L}$ gaugegroup without parity, which leads to "large" light-heavy neutrino mixing whilekeeping the neutrino masses small in a natural manner guaranteed by discretesymmetries. We point out specific observable implications of this class ofmodels if the $SU(2)_R$-breaking scale is of order 5 TeV, in searches forlepton flavor violating processes such as $\mu\to e\gamma$, $\mu\to 3 e$ and$\mu-e$ conversion in nuclei, and lepton number violating processes such asneutrinoless double beta decay as well as at the LHC. In particular, if theupper limit on BR$(\mu\to e\gamma)$ improves by one order of magnitude, a largerange of the parameters of the model would be ruled out.

Natural TeV-Scale Left-Right Seesaw for Neutrinos and Experimental Tests