Abstract
The CP-violating MSSM allows existence of a light neutral Higgs boson (MH1≲50 GeV) in the CPX scenario in the low tanβ(≲5) region, which could have escaped the LEP searches due to a strongly suppressed H1ZZ coupling. This parameter space corresponds to a relatively light H+ (MH+<Mt), which is predicted to decay dominantly into the WH1 channel. Thus one expects to see a striking tt¯ signal at the LHC, where one of the top quarks decays into the bbb¯W channel, via t→bH±, H±→WH1 and H1→bb¯. The characteristic correlation between the bb¯, bb¯W and bbb¯W invariant mass peaks is expected to make this signal practically free of the SM background. Our parton level Monte Carlo simulation yields upto 5000 events, for L=30 fb−1, over the parameter space of interest, after taking into account the b-tagging efficiency for three or more b-tagged jets.
Highlights
The search for Higgs bosons and study of their properties is one of the main goals of physics studies at the Tevatron upgrade (Run 2) and the upcoming Large Hadron Collider (LHC)
The precision measurements with Electro-Weak (EW) data indicate the existence of a light Higgs boson (Mh < 246 GeV at 95% C.L.) whereas direct searches rule out the case Mh < 114.4 GeV [1] [2]
We have looked in the CPX scenario, in the CP-violating MSSM, at the region in the tan β– MH± plane, where a light H1 signal might have been lost at LEP due to strong suppression of the H1ZZ coupling and where the Tevatron and the LHC will have no reach due to a simultaneous suppression of the H1ttcoupling as well
Summary
The search for Higgs bosons and study of their properties is one of the main goals of physics studies at the Tevatron upgrade (Run 2) and the upcoming Large Hadron Collider (LHC). The LEP data can allow a much lighter Higgs with a mass
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