@misc{10481/108035,
year = {2025},
month = {11},
url = {https://hdl.handle.net/10481/108035},
abstract = {A scan of the beam energy across the top quark pair (tt) production threshold is
part of the program of future Higgs, top, and electroweak factory projects. In this paper,
we provide projections for the achievable precision in the top quark mass (mt), width (Γt),
and Yukawa coupling (yt) at the electron-positron (e
+e
−) stage of the Future Circular
Collider (FCC-ee). The study includes a detailed assessment of parametric and systematic
uncertainties, as well as a rigorous estimate of the effect of point-to-point correlations. We
project that mt and Γt can be determined with an experimental precision of 6.8 and 11.5 MeV,
respectively, when mt is defined in the potential-subtracted (PS) scheme. The impact of
theoretical uncertainties due to missing higher orders is found to be of about 35 (25) MeV
on mt (Γt) at N3LO in non-relativistic QCD. Therefore, improvements in the theoretical
accuracy, which is an active area of development, are key to match the achievable experimental
precision at a future e
+e
− collider. We also explore the prospects for a measurement of yt
at FCC-ee via a dedicated run above the tt production threshold.},
organization = {MICIU/AEI/10.13039/501100011033 - FEDER/UE (Proyecto PID2022-139466NB-C21)},
organization = {Ministerio de Ciencia y Universidades, España (Proyecto PID2021-122134NB-C21)},
organization = {Generalitat Valenciana (Proyecto CIPROM/2021/073)},
publisher = {Springer Nature},
keywords = {Top quark},
keywords = {Electroweak Precision Physics},
keywords = {Quark Masses},
title = {A detailed study on the prospects for a tt- threshold scan in e+ e− collisions},
doi = {10.1007/JHEP11(2025)020},
author = {Defranchis, Matteo M. and Blas Mateo, Jorge de and Mehta, Ankita and Selvaggi, Michele and Vos, Marcel},
}