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

Author
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Abstract
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This Letter presents the first search for a heavy particle decaying into an e^{±}μ^{∓} final state in sqrt[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 λ_{312}=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.

Year of Publication
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1969
Journal
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Physical review letters
Volume
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106
Issue
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25
Number of Pages
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251801
Date Published
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2011 Jun 24
ISSN Number
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0031-9007
URL
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http://link.aps.org/abstract/PRL/v106/p251801
Short Title
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Search for a Heavy Particle Decaying into an Electron and a Muon
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