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arXiv · 1711.06499

Semi-aligned two Higgs doublet model

Naoyuki Haba·Hiroyuki Umeeda·Toshifumi Yamada
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Abstract

In the left-right symmetric model based on $SU(2)_L\times SU(2)_R\times U(1)_{B-L}$ gauge symmetry, there appear heavy neutral scalar particles mediating quark flavor changing neutral currents (FCNCs) at tree level. We consider a situation where such FCNCs give the only sign of the left-right model while $W_R$ gauge boson is decoupled, and name it "semi-aligned two Higgs doublet model" because the model resembles a two Higgs doublet model with mildly-aligned Yukawa couplings to quarks. We predict a correlation among processes induced by quark FCNCs in the model, and argue that future precise calculation of meson-antimeson mixings and CP violation therein may hint at the semi-aligned two Higgs doublet model and the left-right model behind it.

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Naoyuki Haba, Hiroyuki Umeeda, Toshifumi Yamada. 2017-11-17. Semi-aligned two Higgs doublet model. https://doi.org/10.1103/physrevd.97.035004

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