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arXiv · 1304.8037

When the Higgs meets the Top: Search for t --> ch^0 at the LHC

Kai-Feng Chen·Wei-Shu Hou·Chung Kao·Masaya Kohda
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Abstract

The newly discovered "Higgs" boson h^0, being lighter than the top quark t, opens up new probes for flavor and mass generation. In the general two Higgs doublet model, new ct, cc and tt Yukawa couplings could modify h^0 properties. If t --> ch^0 occurs at the percent level, the observed ZZ^* and γγsignal events may have accompanying cbW activity coming from t\bar{t} feeddown. We suggest that t --> ch^0 can be searched for via h^0 --> ZZ^*, γγ, WW^* and b\bar{b}, perhaps even τ^+τ^- modes in t\bar{t} events. Existing data might be able to reveal some clues for t --> ch^0 signature, or push the branching ratio B(t --> ch^0) down to below the percent level.

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Kai-Feng Chen, Wei-Shu Hou, Chung Kao, Masaya Kohda. 2013-07-29. When the Higgs meets the Top: Search for t --> ch^0 at the LHC. https://doi.org/10.1016/j.physletb.2013.07.060

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