Measurement of the top quark pair production cross-section with ATLAS in the single lepton channel
ArXiv 1201.1889 (2012)
Search for anomalous production of prompt like-sign muon pairs and constraints on physics beyond the Standard Model with the ATLAS detector
ArXiv 1201.1091 (2012)
Study of jets produced in association with a W boson in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
ArXiv 1201.1276 (2012)
A search for flavour changing neutral currents in top-quark decays in pp collision data collected with the ATLAS detector at root s=7 TeV
Journal of High Energy Physics Springer-Verlag 2012:9 (2012) 1-36
Abstract:
A search for flavour changing neutral current (FCNC) processes in top-quark decays by the ATLAS Collaboration is presented. Data collected from pp collisions at the LHC at a centre-of-mass energy of √s = 7 TeV during 2011, corresponding to an integrated luminosity of 2.1 fb-1, were used. A search was performed for top-quark pair-production events, with one top quark decaying through the t → Zq FCNC (q = u, c) channel, and the other through the Standard Model dominant mode t → Wb. Only the decays of the Z boson to charged leptons and leptonic W-boson decays were considered as signal. Consequently, the final-state topology is characterised by the presence of three isolated charged leptons, at least two jets and missing transverse momentum from the undetected neutrino. No evidence for an FCNC signal was found. An upper limit on the t → Zq branching ratio of BR(t → Zq) < 0.73% is set at the 95% confidence level. Copyright CERN.A study of the material in the ATLAS inner detector using secondary hadronic interactions
Journal of Instrumentation IOP Publishing 7:01 (2012) p01013-p01013