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Probing the CP-violating light neutral Higgs in the charged Higgs decay at the LHC

Ghosh, Dilip Kumar and Godbole, RM and Roy, DP (2005) Probing the CP-violating light neutral Higgs in the charged Higgs decay at the LHC. In: Physics Letters B, 628 (1&2). pp. 131-140.

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The CP-violating MSSM allows existence of a light neutral Higgs boson $(M_{H}_{1} \leq 50 GeV)$ in the CPX scenario in the low tan \beta (\leq 5) region, which could have escaped the LEP searches due to a strongly suppressed $H_{1}$ZZ coupling. This parameter space correspondsto a relatively light $H^{+}(M_{H}+<M_{t})$, which is predicted to decay dominantly into the W$H_{1}$ channel. Thus one expects to see a striking tt(tover bar) signal at the LHC, where one of the top quarks decays into the bb(bover bar)W channel, via $t -> bH^{+/-}, H^{+/-} -> WH_{1}$ and $H_{1}$ -> b(b)over bar. The characteristic correlation between the b(b)over bar, b(b)over barW and bb(b)over barW 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.

Item Type: Journal Article
Publication: Physics Letters B
Publisher: Elsevier Science
Additional Information: Copyright for this article belongs to Elsevier.
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited: 22 Nov 2005
Last Modified: 19 Sep 2010 04:21
URI: http://eprints.iisc.ac.in/id/eprint/4082

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