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Updated: May 18, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Search for a light pseudoscalar Higgs boson in the dimuon decay channel in pp collisions at √s = 7 TeV
S Chatrchyan1, V Khachatryan, A M Sirunyan
1Yerevan Physics Institute, Armenia.
Abstract:
The dimuon invariant mass spectrum is searched in the range between 5.5 and 14 GeV for a light pseudoscalar Higgs boson a, predicted in a number of new physics models, including the next-to-minimal supersymmetric standard model. The data sample used in the search corresponds to an integrated luminosity of 1.3 fb(-1) collected in pp collisions at √s = 7 TeV with the CMS detector at the LHC. No excess is observed above the background predictions and upper limits are set on the cross section times branching fraction σ × B(pp→a→μ(+)μ(-)) in the range of 1.5-7.5 pb. These results improve on existing bounds on the abb coupling for m(a) < m(Υ(1S)) and are the first significant limits for m(a) > m(Υ(3S)). Constraints on the supersymmetric parameter space are presented in the context of the next-to-minimal model.
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