https://doi.org/10.1140/epjc/s10052-021-09201-w
Regular Article - Theoretical Physics
Probing loop effects in wrong-sign Yukawa coupling region of Type-II 2HDM
ARC Centre of Excellence for Dark Matter Particle Physics, Department of Physics, University of Adelaide, 5005, Adelaide, South Australia, Australia
Received:
18
April
2020
Accepted:
2
May
2021
Published online:
10
May
2021
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 
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 
GeV, the wrong-sign Yukawa regions are excluded largely except for the tiny allowed region around 
under the combined Higgs constraints. The excluded region is also nearly independent of parameter 
or 
. The situation changes a lot after including loop corrections to the indirect searches, for example 
, the region with 
will be stronger constrained to be totally excluded. Whilst parameter space with 
would get larger survived wrong-sign region for 
compared to it at tree level. We also conclude Higgs direct searches works better on constraining 
GeV range than theoretical constraints. We also find that the loop-level wrong-sign Yukawa limit only occurs at mass decoupling scale.
© The Author(s) 2021
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