Scientific article
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Search for a Heavy Particle Decaying into an Electron and a Muon with the ATLAS Detector in √s=7  TeV pp collisions at the LHC

ContributorsATLAS Collaboration
Published inPhysical review letters, vol. 106, no. 25, 251801
Publication date2011

This Letter presents the first search for a heavy particle decaying into an e±μ∓ final state in √s=7  TeV pp collisions at the LHC. The data were recorded by the ATLAS detector during 2010 and correspond to a total integrated luminosity of 35  pb−1. No excess above the standard model background expectation is observed. Exclusions at 95% confidence level are placed on two representative models. In an R-parity violating supersymmetric model, tau sneutrinos with a mass below 0.75 TeV are excluded, assuming all R-parity violating couplings are zero except λ′311=0.11 and λ312=0.07. In a lepton flavor violating model, a Z′-like vector boson with masses of 0.70–1.00 TeV and corresponding cross sections times branching ratios of 0.175–0.183 pb is excluded. These results extend to higher mass R-parity violating sneutrinos and lepton flavor violating Z's than previous constraints from the Tevatron.

Citation (ISO format)
ATLAS Collaboration. Search for a Heavy Particle Decaying into an Electron and a Muon with the ATLAS Detector in √s=7  TeV <em>pp</em> collisions at the LHC. In: Physical review letters, 2011, vol. 106, n° 25, p. 251801. doi: 10.1103/PhysRevLett.106.251801
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Article (Published version)
ISSN of the journal0031-9007

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