A search of charged Higgs in the decay products of pair-produced top quarks.


Introduction:
Two Higgs doublet extensions of the Standard Model predict the existence of charged Higgs bosons ( H^{+/-}). In such models  the branching  fraction for top quarks B(t->H^{+}b) can be large  thus  competing with the SM decay t->W^{+}b.
This study presents the results of a search of charged Higgs in the decay products of the pair-produced top quarks. This search is based on the cross section measurements of ttbar production in three exclusive decay channels; the "dilepton" , "lepton + jets" and "lepton + hadronic tau" channel.
Assuming the charged Higgs decays to csbar, taunu and Wbbbar,  limits in the  t->Hb branching ratio are obtained. The interpretation of these results in the framework of SUSY theory and in a general Type II Two Doublet Higgs model are also presented.

A novel "model independent" search is also presented, obtaining limits that are independent of the model predictions of the branching ratios.

Authors : Ricardo Eusebi,  Andy Hocker , Paul Tipton.  
University of Rochester
FOR THE CDF COLLABORATION

  • Contact person : Ricardo Eusebi

    • Look at the Conference Note (ps)


    Link Index:

    Method :
     Tree Level MSSM


    Results  :
     Tree Level MSSM
     Model Independent

    Tree level MSSM method

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    Tree level MSSM results
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    Model Independent results

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    Last updated  : August 18, 2004.
    Ricardo Eusebi (eusebi@fnal.gov)
    Ricardo's main page.