SciPost Submission Page

Tau-lepton Physics at the FCC-ee circular e$^+$e$^-$ Collider

by Mogens Dam

Submission summary

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
Proceedings issue:	The 15th International Workshop on Tau Lepton Physics (Amsterdam, 2018-09)
Domain(s):	Experimental
Subject area:	High-Energy Physics - Experiment

Abstract

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.