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Paper   IPM / Particles / 8890
School of Particles and Accelerator
  Title:   On the Charged Higgs Bosons Effects in the Top
  Author(s):  mojtaba Mohammadi Najafabadi
  Status:   Published
  Year:  2006
  Supported by:  IPM
The collider experiments at the Tevatron and the LHC provide us the possibility of probing the existence of a light charged Higgs boson. In this paper we study semi-leptonic decay of a polarized top quark via the charged Higgs boson (t(↑)→ H+bl+νlb). It is shown that the asymmetry or spin correlation coefficient of the charged lepton depends on the tanβ and MH± and is quite different from the Standard Model. This sensitivity of asymmetry to tanβ and MH± could be utilized in the experimental searches for the light charged Higgs for separation of the signal from backgrounds in the ttH+Wbb→τ+ντ\lν\lbb (and vice versa). It might be useful for obtaining better bounds in the (tanβ,MH±) plane too.

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