https://doi.org/10.1140/epjc/s10052-013-2530-7
Special Article - Tools for Experiment and Theory
Top quark mass measurements at and above threshold at CLIC
1
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805, Munich, Germany
2
CERN, 1211, Geneva, Switzerland
* e-mail: fsimon@mpp.mpg.de
Received:
15
March
2013
Revised:
26
July
2013
Published online:
20
August
2013
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. With a threshold scan, total uncertainties of around 100 MeV are achieved, including theoretical uncertainties in a well-defined top mass scheme. For the threshold scan, the precision at ILC is also studied to provide a comparison of the two linear collider technologies.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013
