Abstract
The effect of single top production on the study of top quark pair production in future high energy electron–positron colliders is evaluated. The rate of the single top quark production process is sizeable throughout a large range of center-of-mass energies and the final state cannot easily be distinguished from the dominant pair production process. We discuss the impact on the top quark mass extraction from a scan through the pair production threshold and the determination of top quark form factors in the continuum. These results advocate for the exploration of the inclusive $$e^+e^-\rightarrow W^+bW^-\bar{b}$$ process, that includes both top quark pair and single top quark production.
Highlights
A high-luminosity, high-energy, linear e+e− collider yields excellent opportunities for precision tests of the Standard Model of particle physics
The combination of precisely calculable electroweak production and strict control of the initial state with the relatively benign experimental environment and state-of-the-art detector systems allow for a characterization of Standard Model and new physics processes with a precision that goes well beyond what can be achieved at hadron colliders
In this note we investigate the impact of single top events in the study of top quark pair production and propose a more inclusive experimental strategy that compares precise predictions for the e+e− → W +bW −bprocess to measurements
Summary
A high-luminosity, high-energy, linear e+e− collider yields excellent opportunities for precision tests of the Standard Model of particle physics. Note that for the t → bW decay, this process gives rise to the same W +bW −bfinal state as top pair production. A third group of processes gives rise to the same final state: W W Z , W W h and W W γ production, with Z /γ / h → bb. In many studies of the linear collider prospects for top physics, single top quark production has been neglected. Results for the cross-section of top quark pair production are available at NNLO. In this note we investigate the impact of single top events in the study of top quark pair production and propose a more inclusive experimental strategy that compares precise predictions for the e+e− → W +bW −bprocess to measurements.
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