Search for lepton flavour violation in the eμ continuum with the ATLAS detector in $\sqrt{s} = 7~\mbox{TeV}$ pp collisions at the LHC

Abstract This paper presents a search for the t-channel exchange of an R-parity violating scalar top quark ( $\tilde{t}$ ) in the e ± μ ∓ continuum using 2.1 fb−1 of data collected by the ATLAS detector in $\sqrt{s}=7~\mbox{TeV}$ pp collisions at the Large Hadron Collider. Data are found to be consistent with the expectation from the Standard Model backgrounds. Limits on R-parity-violating couplings at 95 % C.L. are calculated as a function of the scalar top mass ( $m_{\tilde{t}}$ ). The upper limits on the production cross section for pp→eμX, through the t-channel exchange of a scalar top quark, ranges from 170 fb for $m_{\tilde{t}}=95~\mbox{GeV}$ to 30 fb for $m_{\tilde{t}}=1000~\mbox{GeV}$ .