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

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^-1 of integrated luminosity collected in 2011 at sqrt(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 pT > 20 GeV and abs(eta) < 2.5. Minimal requirements are placed on the rest of the event activity. The distribution of the invariant mass of the muon pair m(mumu) 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(mumu) 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++/H--). Assuming pair production of H++/H-- bosons and a branching ratio to muons of 100% (33%), this analysis excludes masses below 355 (244) GeV and 251 (209) GeV for H++/H-- bosons coupling to left-handed and right-handed fermions, respectively.

10 pages plus author list (22 pages total), 3 figures, 3 tables, final version published in Physical Review D

References in corpus (19)

• PYTHIA 6.4 Physics and Manual
• Parton distributions for the LHC
• Implications of CTEQ global analysis for collider observables
• Vector boson pair production at the LHC
• Simplified Models for a First Characterization of New Physics at the LHC
• Performance of the ATLAS Trigger System in 2010
• Hard Interactions of Quarks and Gluons: a Primer for LHC Physics
• Performance of missing transverse momentum reconstruction in proton-proton collisions at 7 TeV with ATLAS
• Heavy Majorana Neutrinos in the Effective Lagrangian Description: Application to Hadron Colliders
• Next-to-leading order QCD corrections to t-tbar-Z production at the LHC
• Effective four-fermion operators in top physics: a roadmap
• Top Quark Forward-Backward Asymmetry and Same-Sign Top Quark Pairs
• No like-sign tops at Tevatron: Constraints on extended models and implications for the t tbar asymmetry
• Inclusive search for same-sign dilepton signatures in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Measurements of the electron and muon inclusive cross-sections in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Top quark forward-backward asymmetry at Tevatron and its implications at the LHC
• Search for pair production of doubly-charged Higgs bosons in the H^{++}H^{--}^ to mu^+mu^+mu^-mu^- final state at D0
• Searching for doubly charged Higgs bosons at the LHC in a 3-3-1 Model
• Search for new physics in high $p_T$ like-sign dilepton events at CDF~II

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