Affleck-Dine Leptogenesis from Higgs Inflation

TL;DR

This paper proposes a unified model where the triplet Higgs in the Type II seesaw mechanism explains inflation, neutrino masses, and baryon asymmetry, with testable predictions for future experiments.

Contribution

It introduces a model linking Higgs inflation, neutrino mass generation, and baryogenesis via triplet Higgs decay, with specific parameter space and experimental testability.

Findings

Triplet Higgs can generate neutrino masses and baryon asymmetry.

Model viable for triplet masses as low as 1 TeV.

Predictions include signals at future colliders and rare decay experiments.

Abstract

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.