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arXiv · 1706.07694

Approximate Alignment in Two Higgs Doublet Model with Extra Yukawa Couplings

Wei-Shu Hou·Mariko Kikuchi
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Abstract

With discovery of the 125 GeV boson $h^0$, the existence of a second doublet is very plausible. We show that the "alignment" phenomenon, that $h^0$ is found to resemble closely the Standard Model Higgs boson, may correspond to Higgs quartic couplings $\eta_i$ that are ${\cal O}(1)$ in strength. If the exotic bosons of the second doublet possess extra top Yukawa couplings, which are the least constrained by data, such a two Higgs doublet model could drive electroweak baryogenesis, as well as further "protect" the apparent alignment. The exotic Higgs bosons can be sub-TeV in mass while remaining well hidden so far, with broad parameter space for search at the Large Hadron Collider.

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Wei-Shu Hou, Mariko Kikuchi. 2017-06-23. Approximate Alignment in Two Higgs Doublet Model with Extra Yukawa Couplings. https://doi.org/10.1209/0295-5075/123/11001

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