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arXiv · 1810.07661

Signature of Pseudo Nambu-Goldstone Higgs boson in its Decay

Qing-Hong Cao·Ling-Xiao Xu·Bin Yan·Shou-hua Zhu
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Abstract

If the Higgs boson is a pseudo Nambu-Goldstone boson (PNGB), the $hZγ$ contact interaction induced by the $\mathcal{O}(p^4)$ invariants of the non-linear sigma model is free from its nonlinearity effects. The process $h\rightarrow Zγ$ can be used to eliminate the universal effects of heavy particles, which can fake the nonlinearity effects of the PNGB Higgs boson in the process $h\rightarrow V^*V$ ($V=W^\pm$,\ $Z$). We demonstrate that the ratio of the signal strength of $h\rightarrow Zγ$ and $h\rightarrow V^*V$ is good to distinguish the signature of the PNGB Higgs boson from Higgs coupling deviations.

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Qing-Hong Cao, Ling-Xiao Xu, Bin Yan, Shou-hua Zhu. 2018-10-17. Signature of Pseudo Nambu-Goldstone Higgs boson in its Decay. https://doi.org/10.1016/j.physletb.2018.12.040

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