Search for a Heavy Particle Decaying into an Electron and a Muon with the ATLAS Detector in {radical}(s)=7 TeV pp collisions at the LHC

Journal Article · Fri Jun 24 00:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.106.251801· OSTI ID:21567474

Aad, G; Ahles, F; Beckingham, M; Bernhard, R; Bitenc, U; Bruneliere, R; Caron, S; Carpentieri, C; Christov, A; Dahlhoff, A; Dietrich, J; Eckert, S; Fehling-Kaschek, M; Flechl, M; Glatzer, J ^[1]; Abbott, B ^[2]; Abdallah, J; Bosman, M; Casado, M P; Cavalli-Sforza, M ^[3]

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1. Fakultaet fuer Mathematik und Physik, Albert-Ludwigs-Universitaet, Freiburg i.Br. (Germany)
2. Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, Oklahoma (United States)
3. Institut de Fisica d'Altes Energies and Universitat Autonoma de Barcelona and ICREA, Barcelona (Spain)

This Letter presents the first search for a heavy particle decaying into an e{sup {+-}}{mu}{sup {+-}} final state in {radical}(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{sup -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 {lambda}{sub 311}{sup '}=0.11 and {lambda}{sub 312}=0.07. In a lepton flavor violating model, a Z{sup '}-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.

• OSTI ID: 21567474
• Journal Information: Physical Review Letters, Vol. 106, Issue 25; Other Information: DOI: 10.1103/PhysRevLett.106.251801; (c) 2011 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

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