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

S. Chatrchyan, V. Khachatryan, A.M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, J. Erö, C. Fabjan, M. Friedl, …
Physical review letters, Vol.109(12), 121801
American Physical Society
2012-01-01
DOI: https://doi.org/10.1103/PhysRevLett.109.121801
PMID: 23005937

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 ?×B(pp›a›µ+µ-) in the range of 1.5-7.5pb. These results improve on existing bounds on the abb¯ coupling for ma<m?(1S) and are the first significant limits for ma>m?(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 http://creativecommons.org/licenses/by/3.0/ 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.

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