CP-violating MSSM Higgs at Tevatron and LHC

Abstract

We analyze the prospect for observing the intermediate neutral Higgs boson ($h_2$) in its decay to two lighter Higgs bosons ($h_1$) at the presently operating hadron colliders in the framework of the CP violating MSSM using the PYTHIA event generator. We consider the lepton+ 4-jets+ $\met$ channel from associate $W{h}_2$ production, with $W h_2 \ra W h_1 h_1 \ra \ell ν_\ell b \bar b b\bar b$. We require two or three tagged $b$-jets. We explicitly consider all relevant Standard Model backgrounds, treating $c$-jets separately from light flavor and gluon jets and allowing for mistagging. We find that it is very hard to observe this signature at the Tevatron, even with 20 fb${}^{-1}$ of data, in the LEP--allowed region of parameter space due to the small signal efficiency. At the LHC, a priori huge SM backgrounds can be suppressed by applying judiciously chosen kinematical selections. After all cuts, we are left with a signal cross section of around 0.5 fb, and a signal to background ratio between 1.2 and 2.9. According to our analysis this Higgs signal should be viable at the LHC in the vicinity of present LEP exclusion once 20 to 50 fb${}^{-1}$ of data have been accumulated at $\sqrt{s}=14$ TeV.

6 pages, 2 figures, talk presented at PASCOS 2010(Valencia) and SUSY 10(Bonn)

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• Light neutral CP-even Higgs boson within Next-to-Minimal Supersymmetric Standard model (NMSSM) at the Large Hadron electron Collider (LHeC)
• Higgs production in CP-violating supersymmetric cascade decays: probing the `open hole' at the Large Hadron Collider
• Multilepton Signatures of the Higgs Boson through its Production in Association with a Top-quark Pair