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|Paper IPM / Particles / 8890||
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+b → l+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 t―t→ H+W−b―b→τ+ντ\l−―ν\lb―b (and vice versa). It might be useful for obtaining better bounds in the (tanβ,MH±) plane too.
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