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Search for anomalous production of prompt like-sign muon pairs and constraints on physics beyond the standard model with the ATLAS detector

Author(s)
Taylor, Frank E.
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Abstract
An inclusive search for anomalous production of two prompt, isolated muons with the same electric charge is presented. The search is performed in a data sample corresponding to 1.6  fb[superscript -1] of integrated luminosity collected in 2011 at √s=7  TeV with the ATLAS detector at the LHC. Muon pairs are selected by requiring two isolated muons of the same electric charge with p[subscript T]>20  GeV and |η|<2.5. Minimal requirements are placed on the rest of the event activity. The distribution of the invariant mass of the muon pair m(μμ) is found to agree well with the background expectation. Upper limits on the cross section for anomalous production of two muons with the same electric charge are placed as a function of m(μμ) within a fiducial region defined by the event selection. The fiducial cross-section limit constrains the like-sign top-quark pair-production cross section to be below 3.7 pb at 95% confidence level. The data are also analyzed to search for a narrow like-sign dimuon resonance as predicted for e.g. doubly charged Higgs bosons (H[superscript ±±]). Assuming pair production of H[superscript ±±] bosons and a branching ratio to muons of 100% (33%), this analysis excludes masses below 355 (244) GeV and 251 (209) GeV for H[superscript ±±] bosons coupling to left-handed and right-handed fermions, respectively.
Date issued
2012-02
URI
http://hdl.handle.net/1721.1/70091
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aad, G. et al. “Search for Anomalous Production of Prompt Like-sign Muon Pairs and Constraints on Physics Beyond the Standard Model with the ATLAS Detector.” Physical Review D 85.3 (2012): Web. 20 Apr. 2012. © 2012 CERN
Version: Final published version
ISSN
1550-7998
1089-4918

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