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Higgs Quark Flavor Violation: Simplified Models and Status of General Two-Higgs-Doublet Model by Juan Herrero-Garcia; Miguel Nebot; Filip Rajec; Martin White; Anthony G. Williams is a Physics and Astronomy article available to read on EtoBox.

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## Abstract We study quark flavor violating interactions mediated by the Higgs boson h. We consider observables involving a third generation quark, of both the up and the down quark sectors, like h → bs and t → ch. Using an effective field theory approach we systematically list all the possible tree-level ultraviolet completions, which comprise models with vector-like quarks and/or extra scalars. We provide upper bounds on the flavor violating transitions allowed by current limits stemming from low energy processes, such as meson mixing and b → sγ. We find that scenarios with vector-like quarks always have very suppressed flavor-violating transitions, while a general Two-Higgs-Doublet Model may have a sizeable rate. To study the latter case in detail, we perform a full numerical simulation taking into account all relevant theoretical and phenomenological constraints. Our results show that BR(t → ch) [BR(h → bs)] are still allowed at the sub-percent [percent] level, which are being [may be] explored at the LHC [future colliders]. Finally, we have found that the mild mass-splitting discrepancy with respect to the SM in the B~s~ meson system can be accommodated in the Two-Higgs-Double

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Author

Juan Herrero-Garcia; Miguel Nebot; Filip Rajec; Martin White; Anthony G. Williams

Publisher

Springer Science and Business Media LLC

Published

2020

Language

EN

Field

Physics and Astronomy (Physical Sciences)