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Search for a Light Pseudoscalar Higgs Boson in the Dimuon Decay Channel in pp Collisions at √s=7  TeV

Author(s)
Bauer, Gerry P.; Bendavid, Joshua L.; Busza, Wit; Butz, Erik M.; Cali, Ivan Amos; Chan, M.; Dutta, V.; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Hahn, Kristian Allan; Kim, Y.; Klute, Markus; Krajczar, Krisztian F.; Li, W.; Luckey, P. David, Jr.; Ma, Teng; Nahn, Steven; Paus, Christoph M. E.; Ralph, Duncan Kelley; Roland, Christof E.; Roland, Gunther M.; Rudolph, M.; Stephans, George S. F.; Stockli, Fabian; Sumorok, Konstanty C.; Sung, Kevin Kai Hong; Velicanu, Dragos Alexandru; Wenger, Edward Allen; Wolf, R.; Wyslouch, Boleslaw; Xie, S.; Yang, M.; Yilmaz, Yetkin; Yoon, A. S.; Zanetti, Marco; ... Show more Show less
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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[superscript -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[superscript +]μ[superscript -]) in the range of 1.5–7.5 pb. These results improve on existing bounds on the abb̅ coupling for m[subscript a]<m[subscript Υ(1S)] and are the first significant limits for m[subscript a]>m[subscript Υ(3S)]. Constraints on the supersymmetric parameter space are presented in the context of the next-to-minimal model.
Date issued
2012-09
URI
http://hdl.handle.net/1721.1/76304
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Chatrchyan, S. et al. “Search for a Light Pseudoscalar Higgs Boson in the Dimuon Decay Channel in Pp Collisions at Sqrt[s]=7  TeV.” Physical Review Letters 109.12 (2012). © 2012 CERN, for the CMS Collaboration
Version: Final published version
ISSN
0031-9007
1079-7114

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