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Published January 2019 | Published + Submitted
Journal Article Open

Type-II seesaw scalar triplet model at a 100 TeV pp collider: discovery and higgs portal coupling determination


We investigate the collider phenomenology of the scalar triplet particles in the Type-II seesaw model at a 100 TeV pp collider. Depending on triplet vacuum expectation value vΔ, the dominant discovery channels could be H++H−− and H±±H∓. We find the H±±H∓ → W±W±hW∓/ℓ±ℓ±hW∓ channels are promising for both model discovery at relatively large vΔ and determination of the Higgs portal couplings λ_4 and λ_5. We also find that these two channels are complementary to indirect determination of _λ4 from future precise measurements on h → γ γdecay rate. Together with pair production of the doubly-charged Higgs subsequently decaying into same-sign di-leptons, the H±±H∓ channels have the potential to cover a significant portion of the parameter space of the Type-II seesaw complex scalar triplet model.

Additional Information

© 2019 The Authors. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. Article funded by SCOAP3. Received: November 29, 2018; Accepted: January 5, 2019; Published: January 11, 2019. YD would like to thank Huai-Ke Guo and Hao-Lin Li for many useful discussions on MadGraph and Olivier Mattelaer for quickly answering several technical questions about MadGraph through launchpad. YD, MJRM, and JHY were supported in part under U.S. Department of Energy contract DE-SC0011095. JHY is also supported by the National Science Foundation of China under Grants No. 11875003 and the Chinese Academy of Sciences (CAS) Hundred-Talent Program.

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Published - Du2019_Article_Type-IISeesawScalarTripletMode.pdf

Submitted - 1810.09450.pdf


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