Spin Correlations in tt Events from pp Collisions (inbunden)
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Format
Inbunden (Hardback)
Språk
Engelska
Antal sidor
233
Utgivningsdatum
2015-07-09
Upplaga
2015 ed.
Förlag
Springer International Publishing AG
Illustratör/Fotograf
Bibliographie 251 schwarz-weiße und 14 farbige Abbildungen
Illustrationer
9 Illustrations, color; 103 Illustrations, black and white; XXIV, 233 p. 112 illus., 9 illus. in col
Dimensioner
234 x 156 x 16 mm
Vikt
540 g
Antal komponenter
1
Komponenter
1 Hardback
ISBN
9783319189314

Spin Correlations in tt Events from pp Collisions

Measured at s = 7 TeV in the Lepton+Jets Final State with the ATLAS Detector

Inbunden,  Engelska, 2015-07-09
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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.
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Övrig information

Boris Lemmer studied physics at the Universities of Gieen and Ume. He worked within the CrystalBall/TAPS collaboration on the study of in-medium properties of hadrons. For his PhD thesis at the University of Gttingen he joined the ATLAS collaboration and studied the properties of the top quark, which is still his research focus.

Innehållsförteckning

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.