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Higgs potential and hidden light Higgs scenario in two Higgs doublet models

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Title
Higgs potential and hidden light Higgs scenario in two Higgs doublet models
Author(s)
Sanghyeon Chang; Sin Kyu Kang; Joing-Phil Lee; Jeonghyeon Song
Publication Date
2015-10
Journal
Physical Review D - Particles, Fields, Gravitation and Cosmology, v.92, no.7, pp.075023
Publisher
American Physical Society
Abstract
In two Higgs doublet models, there exists an interesting possibility, the hidden light Higgs scenario, that the discovered SM-like Higgs boson is the heavier CP-even Higgs boson H-0 and the lighter CP-even h(0) has not been observed yet in any experiment. We study the current status of this scenario in Types I, II, X, and Y, through the scans of the parameters with all relevant theoretical and experimental constraints. We employ not only the most up-to-date Higgs signal strength measurements with the feed-down effects, but also all the available LHC exclusion limits from heavy Higgs searches. Adjusting the heavier H-0 to the 125 GeV state while hiding the lighter h(0) from the LEP Higgs search prohibits the extreme decoupling limit: there exist upper bounds on the masses of the pseudoscalar A(0) and the charged Higgs H-+/- below about 600 GeV. In addition, the Z(2) symmetry is shown to be a good approximate symmetry since the soft Z(2) symmetry breaking parameter m(12)(2) should be less than about (45 GeV)(2). Most interestingly, a few parameters in the Higgs potential and the related Higgs triple and quartic couplings are shown to be meaningfully constrained by the current data. The double Higgs-strahlung process at an e(+)e(-) collider is also studied.
URI
https://pr.ibs.re.kr/handle/8788114/1870
DOI
10.1103/PhysRevD.92.075023
ISSN
1550-7998
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > 1. Journal Papers (저널논문)
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