Abstract
We analyse the prospects to detect at the LHC the neutral Higgs particles of the Minimal Supersymmetric Standard Model, when the masses of the two CP-even h,H and of the CP-odd A boson are close to one another, and the value of tanβ is large. In this “intense-coupling regime”, the Higgs bosons have strongly enhanced couplings to isospin down-type fermions and large total decay widths, so that the γγ,WW∗ and ZZ∗ decay modes of the three Higgs bosons are strongly suppressed. We advocate the use of the decays into muon pairs, h,H,A→μ+μ−, to resolve the three Higgs boson peaks: although the branching ratios are small, O(10−4), the resolution on muons is good enough to allow for their detection, if the mass splitting is large enough. Using an event generator analysis and a fast detector simulation, we show that the process pp→bb̄μ+μ−, when at least one of the b-quarks is detected, is viable.
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