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arXiv · 1907.09684

Pseudo-Nambu-Goldstone dark matter and two-Higgs-doublet models

Xue-Min Jiang·Chengfeng Cai·Zhao-Huan Yu·Yu-Pan Zeng·Hong-Hao Zhang
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Abstract

We study a dark matter model with one singlet complex scalar and two Higgs doublets. The scalar potential respects a softly broken global symmetry, which makes the imaginary part of the singlet become a pseudo-Nambu-Goldstone boson acting as a dark matter candidate. The pseudo-Nambu-Goldstone nature of the boson leads to the vanishing of its tree-level scattering amplitude off nucleons at zero momentum transfer. Therefore, although the interaction strength could be sufficiently large to yield a viable relic abundance via thermal mechanism, direct detection is incapable of probing this candidate. We further investigate the constraints from Higgs measurements, relic abundance observation, and indirect detection.

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Xue-Min Jiang, Chengfeng Cai, Zhao-Huan Yu, Yu-Pan Zeng, Hong-Hao Zhang. 2019-10-11. Pseudo-Nambu-Goldstone dark matter and two-Higgs-doublet models. https://doi.org/10.1103/physrevd.100.075011

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