Charged Higgs Boson Search at the Tevatron Upgrade Using Tau(19)

We explore the prospect of charged Higgs boson search in top quark decay at the Tevatron collider upgrade, taking advantage of the opposite states of $\tau$ polarization resulting from the $H^\pm$ and $W^\pm$ decays. Methods of distinguishing the two contr

Figure Captions

s=2TeV.The cross-sections are shown as functions of neutral pion E T accompanying

the charged track in theτ-jet.

Fig. 2.The1-prong hadronicτ-jet cross-sections are plotted against the jet E T in

(a)without and(b)with the isolation cut.They are plotted against the

?E T of the jet in(c).The H±signal(W±background)contributions are

shown as solid(dashed)lines for m H=100GeV and dot-dashed(dotted)

√

lines for m H=140GeV.We take

s=4TeV.The solid(dashed) and dot-dashed(dotted)lines correspond to the signal(background)for

m H=100and150GeV respectively.We take tanβ=1.4.

Fig. 6.The signal cross-sections of Fig.5(a,b,c),satisfying a signal to background ratio≥1,are shown as functions of tanβfor m H=80,100,120,140and

150GeV by solid,dashed,dot-dashed,double-dot-dashed and dotted lines

respectively.

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