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| As Contributors: | Mogens Dam |
| Arxiv Link: | https://arxiv.org/abs/1811.09408v2 |
| Date accepted: | 2019-01-10 |
| Date submitted: | 2018-12-18 |
| Submitted by: | Dam, Mogens |
| Submitted to: | SciPost Physics Proceedings |
| Domain(s): | Experimental |
| Subject area: | High-Energy Physics - Experiment |
The future FCC-ee collider is designed to deliver $\mathrm{e^+e^-}$ collisions to study with ultimate precision the Z, W, and Higgs bosons, and the top quark. In a high-statistics scan around the Z pole, $1.3\times 10^{11}$ events $\mathrm{Z}\to\tau\tau$ will be produced, the largest sample of $\tau\tau$ events foreseen at any lepton collider. With their large boost, $\tau$ leptons from Z decays are particularly well suited for precision measurements. The focus of this report is on tests of lepton universality from precision measurement of $\boldsymbol{\tau}$ properties and on tests of charged lepton flavour violation in Z decays and in $\tau$ decays. In both of these areas, FCC-ee promises sensitivities well beyond present experimental limits.