Top quark mass measurements at the $t\bar{t}$ threshold with CEPC
Abstract
We present a study of top quark mass measurements at the threshold based on CEPC. A centre-of-mass energy scan near two times of the top mass is performed and the measurement precision of top quark mass, width and are evaluated using the production rates. Realistic scan strategies at the threshold are discussed to maximise the sensitivity to the measurement of the top quark properties individually and simultaneously in the CEPC scenarios assuming a limited total luminosity of 100 fb. With the optimal scan for individual property measurements, the top quark mass precision is expected to be 9 MeV, the top quark width precision is expected to be 26 MeV, and can be measured at a precision of 0.00039. Taking into account the uncertainties from theory, background subtraction, beam energy and luminosity spectrum, the top quark mass can be measured at a precision of 14 MeV optimistically and 34 MeV conservatively at CEPC.
Cite
@article{arxiv.2207.12177,
title = {Top quark mass measurements at the $t\bar{t}$ threshold with CEPC},
author = {Zhan Li and Xiaohu Sun and Yaquan Fang and Gang Li and Shuiting Xin and Shudong Wang and Yiwei Wang and Yuan Zhang and Hao Zhang and Zhijun Liang},
journal= {arXiv preprint arXiv:2207.12177},
year = {2023}
}