# FCC Week 2019

Jun 24 – 28, 2019
Crowne Plaza Brussels Le Palace
Europe/Zurich timezone

## Cross section and differential distributions for top quarks near the production threshold

Jun 27, 2019, 9:30 AM
20m
Crea/Explo (1st floor)

### Crea/Explo

#### 1st floor

Presentation Physics

Thomas Rauh

### Description

A top threshold scan at the FCC-ee could provide a measurement of the top-quark mass in a well-defined scheme with unrivaled precision as well as a determination of the top-quark width and Yukawa coupling. The threshold region is subject to two interesting effects, the strong color-Coulomb attraction between the top quarks which drives the formation of toponium resonances and the fast top-quark decays which impedes this formation, and both need to be incorporated in a sophisticated effective theory framework to obtain reliable results. I review the current status of theoretical predictions for the inclusive $W^+W^-b\bar{b}$ cross section and differential distributions and present sensitivity estimates for the mass and other parameters.