Abstract
In the framework of 2HDM, we explore the wrong-sign Yukawa region with direct and indirect searches up to one-loop level. The direct searches include the latest H/A rightarrow f{bar{f}}, VV, Vh, hh reports at current LHC, and the study of indirect Higgs precision measurements works with current LHC, future HL-LHC and CEPC. At tree level of Type-II 2HDM, for degenerate heavy Higgs mass m_A=m_H=m_{H^pm }<800 GeV, the wrong-sign Yukawa regions are excluded largely except for the tiny allowed region around cos (beta -alpha )in (0.2,0.3) under the combined Higgs constraints. The excluded region is also nearly independent of parameter m_{12} or lambda v^2=m_A^2-m_{12}^2/(sin beta cos beta ). The situation changes a lot after including loop corrections to the indirect searches, for example m_A=1500 text {~GeV}, the region with lambda v^2<0 will be stronger constrained to be totally excluded. Whilst parameter space with lambda v^2>0 would get larger survived wrong-sign region for m_A=800 ~text {~GeV} compared to it at tree level. We also conclude Higgs direct searches works better on constraining lambda v^2 approx 0 GeV range than theoretical constraints. We also find that the loop-level wrong-sign Yukawa limit only occurs at mass decoupling scale.
Highlights
Even at future lepton colliders, the wrong-sign Yukawa region at tree level will be allowed as shown in Fig. 3, even the allowed | cos(β − α)| is less than 0.007. This situation can be changed once the loop level corrections are included, κUloop = κU +
II we work with the ATLAS results ATLAS at 13 TeV up to 80 f b−1, and for HL-LHC, we work with combined results from latest future ATLAS and CMS, up designed luminosity is 5.6 a to 6 b−1 ab√−1. at S
Afte r the indirect searches, here we will take the TypeII 2HDM as an example to compare with the direct LHC
Summary
Where vi (i = 1, 2) are the vacuum expectation values (vev) of the two doublets after EWSB with v12 + v22 = v2 = (246 GeV) and tan β = v2/v1. The most general Yukawa interactions of 1,2 with the SM fermions under the Z2 symmetry is. Depending on the interactions of i coupling to the fermion sector, there are typically four types of 2HDM (Table 1): For a review on different types of 2HDM as well as the phenomena, see Ref. For normalized SM-like Higgs gauge couplings, V = Z , W ±, κV. After EWSB, three Goldstone bosons are absorbed by the SM gauge bosons Z , W ±, providing their masses. Instead of the eight parameters appearing in the Higgs potential m211, m222, m212, λ1,2,3,4,5, a more convenient choice of the parameters is v, tan β, α, mh, m H , m A, m H± , m212
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