Spin Correlations in tt Events from pp Collisions

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

  • Boris Lemmer

Part of the Springer Theses book series (Springer Theses)

Table of contents

  1. Front Matter
    Pages i-xxiv
  2. Boris Lemmer
    Pages 57-67
  3. Boris Lemmer
    Pages 69-81
  4. Boris Lemmer
    Pages 83-92
  5. Boris Lemmer
    Pages 93-120
  6. Boris Lemmer
    Pages 121-134
  7. Boris Lemmer
    Pages 135-157
  8. Boris Lemmer
    Pages 159-178
  9. Boris Lemmer
    Pages 179-186
  10. Back Matter
    Pages 187-233

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.


Beyond standard model physics Down-type quark reconstruction Kinematic likelihood fit Reconstruction algorithms Top quark polarization Top/anti-top events Top/anti-top spin correlation l + jet decay mode

Authors and affiliations

  • Boris Lemmer
    • 1
  1. 1.II. Physikalisches InstitutGeorg-August-Universität GöttingenGöttingenGermany

Bibliographic information