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Spin Correlations in tt Events from pp Collisions

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

  • Book
  • © 2015

Overview

Authors:
  1. Boris Lemmer

    1. II. Physikalisches Institut, Georg-August-Universität Göttingen, Göttingen, Germany

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  • Winner of the Dr. Berliner and Dr. Ungewitter Prize of the University of Göttingen
  • The ideal introduction for students starting to work on top quark analyses
  • Introduces readers to the ATLAS detector and analysis objects
  • Presents a detailed overview of top quark properties and reconstruction algorithms
  • Includes supplementary material: sn.pub/extras

Part of the book series: Springer Theses (Springer Theses)

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Table of contents (9 chapters)

  1. Front Matter

    Pages i-xxiv
    Download chapter PDF

  2. Introducing the Standard Model, Top Quarks and Spin Correlation

    • Boris Lemmer
    Pages 1-55

  3. Experimental Setup

    • Boris Lemmer
    Pages 57-67

  4. Analysis Objects

    • Boris Lemmer
    Pages 69-81

  5. Dataset, Signal and Background Modelling

    • Boris Lemmer
    Pages 83-92

  6. Event Selection and Reconstruction

    • Boris Lemmer
    Pages 93-120

  7. Analysis Strategy

    • Boris Lemmer
    Pages 121-134

  8. Systematic Uncertainties

    • Boris Lemmer
    Pages 135-157

  9. Results and Discussion

    • Boris Lemmer
    Pages 159-178

  10. Summary, Conclusion and Outlook

    • Boris Lemmer
    Pages 179-186

  11. Back Matter

    Pages 187-233
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Keywords

About this book

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.

Authors and Affiliations

  • II. Physikalisches Institut, Georg-August-Universität Göttingen, Göttingen, Germany

    Boris Lemmer

About the author

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

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