Exotic Higgs decays in Type-II 2HDMs at the LHC and future 100 TeV hadron colliders

Kling, Felix (0000 0001 0668 7243, grid.266093.8, Department of Physics and Astronomy, University of California, Irvine, CA, 92697, U.S.A.) ; Li, Honglei (grid.454761.5, School of Physics and Technology, University of Jinan, Jinan, Shandong, 250022, China) ; Pyarelal, Adarsh (0000 0001 2168 186X, grid.134563.6, School of Information, University of Arizona, Tucson, Arizona, 85721, U.S.A.) ; Song, Huayang (0000 0001 2168 186X, grid.134563.6, Department of Physics, University of Arizona, Tucson, Arizona, 85721, U.S.A.) ; Su, Shufang (0000 0001 2168 186X, grid.134563.6, Department of Physics, University of Arizona, Tucson, Arizona, 85721, U.S.A.)

12 June 2019

Abstract: The exotic decay modes of non-Standard Model (SM) Higgses in models with extended Higgs sectors have the potential to serve as powerful search channels to explore the space of Two-Higgs Doublet Models (2HDMs). Once kinematically allowed, heavy Higgses could decay into pairs of light non-SM Higgses, or a non-SM Higgs and a SM gauge boson, with branching fractions that quickly dominate those of the conventional decay modes to SM particles. In this study, we focus on the prospects of probing Type-II 2HDMs at the LHC and a future 100 TeV pp collider via exotic decay channels. We study the three prominent exotic decay channels: A → HZ , A → H ± W ∓ and H ± → HW ± , and find that a 100-TeV pp collider can probe most of the region of the Type-II 2HDM parameter space that survives current theoretical and experimental constraints with sizable exotic decay branching fraction through these channels, making them complementary to the conventional decay channels for heavy non-SM Higgses.


Published in: JHEP 1906 (2019) 031 DOI: 10.1007/JHEP06(2019)031
arXiv: 1812.01633
License: CC-BY-4.0



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