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Analyzing cancellation mechanism of the dark matter-quark scattering in a complex singlet extension of the Standard Model
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We investigate a suppression mechanism of dark matter and quark scattering amplitudes in a complex singlet extension of the Standard Model. It has been pointed out that, in a some variant of the model, the scattering amplitudes cancel each other in the limit in which two mediator scalars degenerate in their masses. We study the origin of such the cancellation mechanism and show that the operators describing the Higgs-singlet scalar mixing play essential role. We derive sum rules for couplings in the general scalar potential of the model, which guarantee the cancellation of the scattering amplitudes in the tree and the 1-loop level.
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Cited by 1 Pith paper
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One-loop analysis of dark matter constraints in a complex scalar extension of the Standard Model
A one-loop calculation of dark matter observables in the complex singlet extension shows quantum corrections significantly shrink the allowed parameter region compared to tree-level analysis.
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