Chiral Symmetry Breaking

ALP-assisted strong first-order electroweak phase transition and baryogenesis
The coupling between an axion-like particle (ALP) and the Higgs boson can potentially enhance the electroweak phase transition to be strongly first order. Local electroweak baryogensis, which has been ruled out for the traditioanl Higgs operator, can be effective for the operator that couples the ALP with various anomalies. This paper investigates such a scenario with various ways to probe.
Keisuke Harigaya, Isaac R. Wang
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ALP-assisted strong first-order electroweak phase transition and baryogenesis