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

• Autores: Anduaga, Xabier Sebastián; Dova, María Teresa; Monticelli, Fernando Gabriel; Tripiana, Martín Fernando; The ATLAS Collaboration
• Año de publicación: 2011
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: Física; Supersymmetric models; Extensions of electroweak gauge sector; Limits on production of particles; Supersymmetric partners of known particles
• Institución: Universidad Nacional de La Plata

This Letter presents the first search for a heavy particle decaying into an ±⁢±⁢ 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.
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Instituto de Física La Plata