Abstract
We analyse the chances of detecting charged Higgs bosons of the Minimal Supersymmetric Standard Model (MSSM) at the Large Hadron Collider (LHC) in the W ± h mode, followed by the dominant decay of the lightest Higgs scalar, h→b b ̄ . If the actual value of M h is already known, this channel offers possibly the optimal final state kinematics for charged Higgs discovery, thanks to the narrow resonances appearing around the W ± and h masses. Besides, within the MSSM, the H ±→ W ± h decay rate is significant for not too large tan β values, thus offering the possibility of accessing a region of MSSM parameter space left uncovered by other search channels. We consider both strong (QCD) and electroweak (EW) `irreducible' backgrounds in the 3 b-tagged channel to the gg→t b ̄ H − production process that had not been taken into account in previous analyses. After a series of kinematic cuts, the largest of these processes is t b ̄ W ±h production in the continuum. However, for optimum tan β, i.e., between 2 and 3, the charged Higgs boson signal overcomes this background and a narrow discovery region survives around M H ± ≈200 GeV.
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