Top Quark Mass Measurements at and above Threshold at CLIC

Katja Seidel,Frank Simon,Michal Tesař,Stephane Poss

The European Physical Journal C（2013）

Cited 90|Views8

Abstract

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.

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Key words

Invariant Mass,Strong Coupling Constant,Direct Reconstruction,Luminosity Spectrum,Simulated Data Point

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