Search for a heavy neutral particle decaying into an electron and a muon using 1 fb−1 of ATLAS data

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Aad, G. ; Abbott, B. ; Abdallah, J. ; Abdelalim, A. A. ; Abdesselam, A. ; Abdinov, O. ; Abi, B. ; Abolins, M. ; Abramowicz, H. ; Abreu, H. ; Acerbi, E. ; Acharya, B. S. ; Adams, D. L. ; Addy, T. N. ; Adelman, J. ; Aderholz, M. ; Adomeit, S. ; Adragna, P. ; Adye, T. ; Aefsky, S. ; Aguilar-Saavedra, J. A. ; Aharrouche, M. ; Ahlen, S. P. ; Ahles, F. ; Ahmad, A. ; Ahsan, M. ; Aielli, G. ; Akdogan, T. ; Åkesson, T. P. A. ; Akimoto, G. ... view all 3,024 authors (2011)

A search is presented for a high mass neutral particle that decays directly to the e ± μ ∓ final state. The data sample was recorded by the ATLAS detector in &#8730;<span style="text-decoration:overline">s</span>=7 TeV pp collisions at the LHC from March to June 2011 and corresponds to an integrated luminosity of 1.07 fb−1. The data are found to be consistent with the Standard Model background. The high e ± μ ∓ mass region is used to set 95% confidence level upper limits on the production of two possible new physics processes: tau sneutrinos in an R-parity violating supersymmetric model and Z′-like vector bosons in a lepton flavor violating model.
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