03889nam 22007215 450 991030041400332120200705071405.03-319-18932-810.1007/978-3-319-18932-1(CKB)3710000000436846(EBL)2120647(OCoLC)911911993(SSID)ssj0001525272(PQKBManifestationID)11816152(PQKBTitleCode)TC0001525272(PQKBWorkID)11485623(PQKB)11532779(DE-He213)978-3-319-18932-1(MiAaPQ)EBC2120647(PPN)186401450(EXLCZ)99371000000043684620150624d2015 u| 0engur|n|---|||||txtccrSpin Correlations in tt Events from pp Collisions Measured at √s = 7 TeV in the Lepton+Jets Final State with the ATLAS Detector /by Boris Lemmer1st ed. 2015.Cham :Springer International Publishing :Imprint: Springer,2015.1 online resource (246 p.)Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053Description based upon print version of record.3-319-18931-X Includes bibliographical references and index at the end of each chapters.Standard Model, Top Quarks and Spin Correlation -- Experimental Setup -- Analysis Objects -- Dataset, Signal and Background Modelling -- Event Selection and Reconstruction -- Analysis Strategy -- Systematic Uncertainties -- Results -- Summary, Conclusion and Outlook.This thesis introduces readers to the Standard Model, the top quark and its properties, before explaining the concept of spin correlation measurement. The first measurement of top quark spin correlations at the LHC in the lepton+jets decay channel is presented. As the heaviest elementary particle, the top quark plays an essential role in the Standard Model of elementary particle physics. In the case of top quarks being produced in pairs at hadron colliders, the Standard Model predicts their spins to be correlated. The degree of correlation depends on both the production mechanism and properties of the top quark. Any deviation from the Standard Model prediction can be an indicator for new physics phenomena. The thesis employs an advanced top quark reconstruction algorithm including dedicated identification of the up- and down-type quarks from the W boson decay.Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053Elementary particles (Physics)Quantum field theoryString theoryPhysical measurementsMeasurement   Elementary Particles, Quantum Field Theoryhttps://scigraph.springernature.com/ontologies/product-market-codes/P23029Quantum Field Theories, String Theoryhttps://scigraph.springernature.com/ontologies/product-market-codes/P19048Measurement Science and Instrumentationhttps://scigraph.springernature.com/ontologies/product-market-codes/P31040Elementary particles (Physics).Quantum field theory.String theory.Physical measurements.Measurement   .Elementary Particles, Quantum Field Theory.Quantum Field Theories, String Theory.Measurement Science and Instrumentation.539.7212Lemmer Borisauthttp://id.loc.gov/vocabulary/relators/aut792532MiAaPQMiAaPQMiAaPQBOOK9910300414003321Spin Correlations in tt Events from pp Collisions1772342UNINA