Top quark mass measurements at and above threshold at CLIC

Understand

We present a study of the expected precision of the top quark mass determination, measured at a linear e+ e- collider based on CLIC technology.

• GEANT4-based detector simulation and full event reconstruction including realistic physics and beam-induced background levels are used.
• Two different techniques to measure the top mass are studied: The direct reconstruction of the invariant mass of the top quark decay products and the measurement of the mass together with the strong coupling constant in a threshold scan, in both cases including first studies of expected systematic uncertainties.
• For the direct reconstruction, experimental uncertainties around 100 MeV are achieved, which are at present not matched by a theoretical understanding on a similar level.