Charged Higgs search via AW ± /HW ± channel

Coleppa, Baradhwaj; Kling, Felix; Su, Shufang

doi:10.1007/jhep12(2014)148

Cited by 81 publications

(120 citation statements)

References 56 publications

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“…Higgs scenario is also naturally accommodated in the 2HDM [6,[29][30][31][32][33][34][35]: H 0 is the 125 GeV state and h 0 has not been observed yet.…”

Section: Lhc Boundsmentioning

confidence: 99%

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

et al. 2015

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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 2 12 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.

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“…Higgs scenario is also naturally accommodated in the 2HDM [6,[29][30][31][32][33][34][35]: H 0 is the 125 GeV state and h 0 has not been observed yet.…”

Section: Lhc Boundsmentioning

confidence: 99%

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

et al. 2015

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“…The exclusion bounds and discovery reach will be explored and interpreted in the context of the Type II 2HDM. A collider analysis considering the same decay channel of a heavy charged Higgs produced in H ± tb associate production has been performed in [26].…”

Section: Jhep11(2015)051mentioning

confidence: 99%

“…However, exotic decay channels, in which a heavy Higgs decays into either two lighter Higgses, or a Higgs plus an SM gauge boson, open up and can even dominate if kinematically allowed, reducing the reach of the conventional search channels. Some of these channels have already been studied both in a theoretical [23][24][25][26][27][28][29][30][31] and experimental [32][33][34] 1 Note that we use h 0 and H 0 to refer to the lighter or the heavier CP-even Higgs for models with two CP-even Higgs bosons. When there is no need to specify, we use H to refer to the CP-even Higgses.…”

Section: Introductionmentioning

confidence: 99%

Light charged Higgs bosons to AW/HW via top decay

Kling

Pyarelal

2015

J. High Energ. Phys.

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While current ATLAS and CMS measurements exclude a light charged Higgs (m H ± < 160 GeV) for most of the parameter region in the context of the MSSM scenarios, these bounds are significantly weakened in the Type II 2HDM once the exotic decay channel into a lighter neutral Higgs, H ± → AW/HW , is open. In this study, we examine the possibility of a light charged Higgs produced in top decay via single top or top pair production, which is the most prominent production channel for a light charged Higgs at the LHC. We consider the subsequent decay H ± → AW/HW , which can reach a sizable branching fraction at low tan β once it is kinematically permitted. With a detailed collider analysis, we obtain exclusion and discovery bounds for the 14 TeV LHC assuming the existence of a 70 GeV neutral scalar. Assuming BR(H ± → AW/HW ) = 100% and BR(A/H → τ τ ) = 8.6%, the 95% exclusion limits on BR(t → H + b) are about 0.2% and 0.03% for single top and top pair production respectively, with an integrated luminosity of 300 fb −1 . The discovery reaches are about 3 times higher. In the context of the Type II 2HDM, discovery is possible at both large tan β > 17 for 155 GeV < m H ± < 165 GeV, and small tan β < 6 over the entire mass range. Exclusion is possible in the entire tan β versus m H ± plane except for charged Higgs masses close to the top threshold. The exotic decay channel H ± → AW/HW is therefore complementary to the conventional H ± → τ ν channel.

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“…Refs. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] Often, one would interpret the lighter CP-even Higgs boson h as the one discovered at the LHC. In the context of the general 2HDM, each Higgs boson mass is actually free parameter before applying any constraint.…”

mentioning

confidence: 99%

“…The previous studies to this search channel at the LHC include Refs. [13,15,19], where the final states ofbb + − , τ + τ − + − , and ZZZ were studied. Also, an experimental analysis of this search channel with multiple lepton and photon final states was carried out at the LHC 8 TeV run [37].…”

mentioning

confidence: 99%