Lorentz and CPT Violation in Top-Quark Production and Decay

Understand

The prospects are explored for testing Lorentz and CPT symmetry in the top-quark sector.

• We present the relevant Lagrange density, discuss physical observables, and describe the signals to be sought in experiments.
• For top-antitop pair production via quark or gluon fusion with subsequent semileptonic or hadronic decays, we obtain the matrix element in the presence of Lorentz violation using the narrow-width approximation.
• The issue of testing CPT symmetry in the top-quark sector is also addressed.