Kavli Affiliate: Hitoshi Murayama
| First 5 Authors: Neil D. Barrie, Chengcheng Han, Hitoshi Murayama, ,
| Summary:
We find that the triplet Higgs of the Type II seesaw mechanism can
simultaneously generate the neutrino masses and observed baryon asymmetry,
while playing a role in inflation. We survey the allowed parameter space and
determine that this is possible for triplet masses as low as a TeV, with a
preference for a small vacuum expectation value for the triplet $v_Delta < 10
$ keV. This requires that the triplet Higgs must decay dominantly into the
leptonic channel. Additionally, this model will be probed at the future 100 TeV
collider, upcoming lepton flavor violation experiments such as Mu3e, and
neutrinoless double beta decay experiments. Thus, this simple framework
provides a unified solution to the three major unknowns of modern physics –
inflation, the neutrino masses, and the observed baryon asymmetry – while
simultaneously providing unique phenomenological predictions that will be
probed terrestrially at upcoming experiments.
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