Probing exotic charged Higgs decays in the Type-II 2HDM through top rich signal at a future 100 TeV pp collider
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Springer
Received: July 1, 2020 Accepted: October 10, 2020 Published: November 20, 2020
Shuailong Li, Huayang Song and Shufang Su Department of Physics, University of Arizona, Tucson, Arizona 85721, U.S.A.
E-mail: [email protected], [email protected], [email protected] Abstract: The exotic decay modes of non-Standard Model Higgs bosons are efficient in probing the hierarchical Two Higgs Doublet Models (2HDM). In particular, the decay mode H ± → HW ± serves as a powerful channel in searching for charged Higgses. In this paper, we analyze the reach for H ± → HW ± → tt¯W at a 100 TeV pp collider, and show that it extends the reach of the previously studied τ τ W final states once above the top threshold. Top tagging technique is used, in combination with a boosted decision tree classifier. At the low tan β region, almost the entire hierarchical Type-II 2HDM parameter space can be probed via the combination of all exotic decay channels. Keywords: Beyond Standard Model, Higgs Physics ArXiv ePrint: 2005.00576
c The Authors. Open Access, Article funded by SCOAP3 .
https://doi.org/10.1007/JHEP11(2020)105
JHEP11(2020)105
Probing exotic charged Higgs decays in the Type-II 2HDM through top rich signal at a future 100 TeV pp collider
Contents 1
2 Type-II 2HDM and charged Higgses
3
3 Signal analysis 3.1 Charged Higgs production and decay 3.2 Search strategy 3.2.1 Opposite-sign dilepton search 3.2.2 Same-sign dilepton search 3.3 Reach of charged Higgs
4 4 5 7 9 10
4 Conclusion
12
1
Introduction
The discovery of the 125 GeV Standard Model (SM)-like Higgs boson at the Large Hadron Collider (LHC) [1, 2] marks the great triumph of the SM in particle physics. The determination of its mass as well as spin has been well established [3, 4]. Subsequent measurements of its couplings to SM particles are consistent with the SM predictions [5, 6]. There are, however, unsolved puzzles at both theoretical and experimental fronts, such as the hierarchy problem, neutrino mass and nature of dark matter, which motivate physicists to explore new physics beyond the SM (BSM). Most of those BSM models involve an extended Higgs sector, with two Higgs Doublets being one of the simplest options. In addition to the SM-like Higgs boson, the spectrum of the Higgs sector in the two Higgs Doublet Model (2HDM) after electroweak symmetry breaking (EWSB) contains four non-SM Higgses, the neutral CP-even Higgs H, the neutral CP-odd Higgs A and a pair of charged Higgses H ± . Two general experimental methods are used to search for non-SM Higgses in the 2HDM. One is indirect search using electroweak precision measurements and Higgs coupling measurements. The other is direct search of new particles at high energy colliders. For indirect search, the constraints of the latest LHC measurements on the 2HDMs parameter space are studied in [7] while the implications of the future Z and Higgs factory precision measurements on the Type-I and Type-II 2HDMs are explored in [8–10]. While the allowed regions are reduced with the im
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