期刊
PHYSICAL REVIEW D
卷 100, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.100.055016
关键词
-
资金
- Department of Science and Technology, India via SERB Grant [EMR/2014/001177]
- DST-DAAD Grant [INT/FRG/DAAD/P-22/2018]
In the wake of new scalar searches at the LHC in various channels, it is interesting to investigate the sacrosanctity of the constraints on the masses and couplings of the heavier scalars in a two-Higgs-doublet model (2HDM). We consider the effects of new physics beyond a 2HDM encoded in terms of bosonic dim-6 operators. Although these constraints are mostly immune to such new physics, we demonstrate that, for a specific class of bosonic operators, the constraints on the masses of the exotic scalars from cascade decays can get substantially relaxed. We present such effects for both degenerate and hierarchical mass spectra of the heavier scalars in 2HDM. Some decay channels of the new scalars vanish at the alignment limit in the tree-level 2HDM. But the inclusion of dim-6 terms can lead to significant cross sections for such processes. It is also pointed out that the observation of such processes can no longer rule out the alignment limit if such dim-6 operators arc present.
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