Baryogenesis via Elementary Goldstone Higgs Relaxation

Preprint number: CP3-Origins-2016-2 DNRF90 and DIAS-2016-2
Authors: Helene Gertov (CP3-Origins & DIAS), Lauren Pearce (Valparaiso University, Valparaiso & University of Minnesota, Minneapolis), Francesco Sannino (CP3-Origins & DIAS), and Louis Yang (University of California, Los Angeles, California)
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We extend the relaxation mechanism to the Elementary Goldstone Higgs frame- work. Besides studying the allowed parameter space of the theory we add the minimal ingredients needed for the framework to be phenomenologically viable. The very nature of the extended Higgs sector allows to consider very flat scalar potential directions along which the relaxation mechanism can be implemented. This fact translates into wider regions of applicability of the relaxation mechanism when compared to the Standard Model Higgs case. Our results show that, if the electroweak scale is not fundamental but radiatively generated, it is possible to generate the observed matter-antimatter asymmetry via the relaxation mechanism.