Search for a light pseudoscalar Higgs boson in the dimuon decay channel in pp collisions at √s=7TeV

Chatrchyan S., Khachatryan V., Sirunyan A., Tumasyan A., Adam W., Bergauer T., ...More

Physical Review Letters, vol.109, no.12, 2012 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 109 Issue: 12
  • Publication Date: 2012
  • Doi Number: 10.1103/physrevlett.109.121801
  • Journal Name: Physical Review Letters
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Yıldız Technical University Affiliated: No


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 mamΥ(3S). Constraints on the supersymmetric parameter space are presented in the context of the next-to-minimal model. © 2012 CERN. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.