(CMS Collaboration) Chatrchyan, S.; Brigljević, Vuko; Đurić, Senka; Kadija, Krešo; Luetić, Jelena; Morović, Srećko (2012) Search for a Light Pseudoscalar Higgs Boson in the Dimuon Decay Channel in pp Collisions at √s=7 TeV. Physical Review Letters, 109 (12). 121801/1-121801/15. ISSN 0031-9007
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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 root 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 sigma x B(pp -> a -> mu(+) mu(-)) in the range of 1.5-7.5 pb. These results improve on existing bounds on the ab (b) over bar coupling for m(a) < m(gamma(1s)) and are the first significant limits for m(a) > m(gamma(3S)). Constraints on the supersymmetric parameter space are presented in the context of the next-to-minimal model.
| Item Type: | Article | ||||||||
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| Uncontrolled Keywords: | standard model; supersymmetry; extension; physics | ||||||||
| Subjects: | NATURAL SCIENCES > Physics | ||||||||
| Divisions: | Division of Experimental Physics | ||||||||
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| Depositing User: | Krešo Kadija | ||||||||
| Date Deposited: | 13 Sep 2013 12:50 | ||||||||
| URI: | http://fulir.irb.hr/id/eprint/605 | ||||||||
| DOI: | 10.1103/PhysRevLett.109.121801 |
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