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 fb1 collected in pp collisions at ffiffi s p ¼ 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 Bðpp ! a ! þÞ in the range of 1.5–7.5 pb. These results improve on existing bounds on the abb coupling for ma < mð1SÞ and are the first significant limits for ma > mð3SÞ. Constraints on the supersymmetric parameter space are presented in the context of the next-to-minimal model.
Search for a Light Pseudoscalar Higgs Boson in the Dimuon Decay Channel in pp Collisions at sqrt[s]=7 TeV
AMAPANE, Nicola Carlo;ARGIRO', Stefano;COSTA, Marco;MIGLIORE, Ernesto;MONACO, Vincenzo;MUSICH, MARCO;OBERTINO, Maria Margherita;PELLICCIONI, Mario;ROMERO, Alessandra;SACCHI, Roberto;V. Sola;SOLANO, Ada Maria;BELLAN, Riccardo;COVARELLI, Roberto;
2012-01-01
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 fb1 collected in pp collisions at ffiffi s p ¼ 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 Bðpp ! a ! þÞ in the range of 1.5–7.5 pb. These results improve on existing bounds on the abb coupling for ma < mð1SÞ and are the first significant limits for ma > mð3SÞ. Constraints on the supersymmetric parameter space are presented in the context of the next-to-minimal model.File | Dimensione | Formato | |
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PhysRevLett.109.121801.pdf
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