When the Higgs meets the top: Search for t -%26gt; ch(0) at the LHC

作者：Chen Kai Feng; Hou Wei Shu^*; Kao Chung; Kohda Masaya

来源：Physics Letters B, 2013, 725(4-5): 378-381.

DOI：10.1016/j.physletb.2013.07.060

The newly discovered %26quot;Higgs%26quot; 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 -%26gt; ch(0) occurs at the percent level, the observed ZZ* and gamma gamma signal events may have accompanying cbW activity coming from t (t) over bar feeddown. We suggest that t -%26gt; ch(0) can be searched for via h(0) -%26gt; ZZ*, gamma gamma, WW* and b (b) over bar, perhaps even tau(+)tau(-) modes in t (t) over bar. events. Existing data might be able to reveal some clues for t -%26gt; ch(0) signature, or push the branching ratio B(t -%26gt; ch(0)) down to below the percent level.

• 出版日期2013-10