The dimuon invariant mass spectrum is searched in the range between 5.5 and 14GeV 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 1.3fb -1 collected in pp collisions at √s=7TeV 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 1.5-7.5pb. These results improve on existing bounds on the abb̄ 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. © 2012 CERN.
Search for a Light Pseudoscalar Higgs Boson in the Dimuon Decay Channel in pp Collisions at √s=7 TeV
Bianchini L.;MESSINEO, ALBERTO MARIA;RIZZI, ANDREA;TONELLI, GUIDO EMILIO;Marini A. C.;
2012-01-01
Abstract
The dimuon invariant mass spectrum is searched in the range between 5.5 and 14GeV 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 1.3fb -1 collected in pp collisions at √s=7TeV 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 1.5-7.5pb. These results improve on existing bounds on the abb̄ coupling for m aI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.