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[en] This paper summarizes a talk given at the Top2008 Workshop at La Biodola, Isola d Elba, Italy. The status of the world average top-quark mass is discussed. Some comments about the challanges facing the experiments in order to further improve the precision are offered.
[en] The different reconstruction algorithms for jets and the calibration scheme for the jet energy scale (JEC) at CMS are summarized. The performance of the description of jet quantities in first data is shown. The importance of jets in the reconstruction of top events is emphasized.
[en] This talk is intended to survey the main topics that will be covered at this workshop, emphasizing some of the issues and goals. The author tries to provide an overview of the physics opportunities once the top quark is detected. Most topics have already been studied to some extent in the literature and will be covered in detail in other talks; I also spend a few minutes on some very recent work about the possibility of detecting CP violation at colliders.
[en] This dissertation describes the measurement of the top quark mass mt using events recorded during a 125 pb-1 exposure of the D0 detector to √s=1.8 TeV anti pp collisions. Six events consistent with the hypothesis t anti t → bW+, anti bW- → b anti lν, anti bl anti ν form the dilepton sample. The kinematics of such events may be reconstructed for any assumed mt, and the likelihood of each such solution evaluated. A measurement of mt based on these relative solution likelihoods gives mt = 169.9 ± 14.8 (stat.) ± 3. 8 (syst.) GeV/c2. A 2C kinematic fit is performed on a sample of 77 events consistent with t anti t → bW+, anti bW- → b anti lν, anti bq anti q , and this, in combination with an estimate on the likelihood that each event is top, yields mt = 173.3 ± 5.6 (stat.) ± 6.2 (syst.) GeV/c2 . A combination of these two measurements gives mt = 173.1 ± 5.2 (stat.) ± 5.7 (syst.) GeV/c2
[en] We review the measurements of the top quark mass by the CDF and D0 collaborations using Run I data in excess of 1.00 pb-1. The D0 collaboration has recently updated its measurement of the top quark mass in the lepton + jets channel. The world average of the top quark mass from the CDF and D0 measurements in the lepton + jets channel now stands at 175.6 ± 5.5 GeV/c2
[en] The top quark mass has been measured using the template method in the t(bar t) → lepton + jets channel based on data recorded in 2011 with the ATLAS detector at the LHC. The data were taken at a proton-proton center-of-mass energy of √s = 7 TeV and correspond to an integrated luminosity of 1.04 fb-1. The analyses in the e + jets and μ + jets decay channels yield consistent results. The top quark mass is measured to be mtop = 174.5 ± 0.6stat ± 2.3syst GeV.
[en] An antenna shower is a parton shower in which the basic move is a color-coherent 2 → 3 parton splitting process. In this paper, we give compact forms for the spin-dependent antenna splitting functions involving massive partons of spin 0 and spin 1/2. We hope that this formalism we have presented will be useful in describing the QCD dynamics of the top quark and other heavy particles at LHC.
[en] Recent top quark properties measurements made with the CMS detector at the LHC are presented. The measurements summarized include spin correlation of top quark pairs, asymmetries, top quark mass, and the underlying event in top quark pair events. The results are compared to the standard model predictions and new physics models.