Search for a heavy neutral particle decaying into an electron and a muon pair using L = 0.87 $fb^{-1}$ of ATLAS data

A search for a high mass neutral particle that decays directly to the $e^\pm \mu^\mp$ final state is presented. The data sample was recorded by the ATLAS detector in $\sqrt{s}=7$ TeV $pp$ collisions at the LHC from March to June 2011 and corresponds to an integrated luminosity of 0.87 fb$^{-1}$. The data are found to be consistent with the Standard Model background estimation. The high $e^\pm \mu^\mp$ 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.