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arXiv · 1309.0774

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

P. S. Bhupal Dev·Chang-Hun Lee·R. N. Mohapatra
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Abstract

We present a TeV-scale left-right ultraviolet completion of type-I seesaw for neutrino masses based on the $SU(2)_L\times SU(2)_R\times U(1)_{B-L}$ 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 $μ\to eγ$, $μ\to 3 e$ 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$(μ\to eγ)$ improves by one order of magnitude, a large range of the parameters of the model would be ruled out.

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P. S. Bhupal Dev, Chang-Hun Lee, R. N. Mohapatra. 2013-11-06. Natural TeV-Scale Left-Right Seesaw for Neutrinos and Experimental Tests. https://doi.org/10.1103/physrevd.88.093010

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