Exploring the dark side of the top Yukawa
classification
✦ hep-ph
keywords
yukawaallowedcouplingleadnegativephysicsstillatlas
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We investigate simple extensions of the Standard Model that could lead to the negative values of the top Yukawa coupling still allowed by the ATLAS Higgs results. Integrating out tree-level new physics generates dimension six operators that can lead to large changes to the top Yukawa couplings. If the top Yukawa coupling is negative, there is new physics beneath the TeV scale. We illustrate the simplest models still allowed by current searches.
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