# $τ$ lepton mass measurement at BESIII

### Submission summary

 As Contributors: Jianyong Zhang Arxiv Link: https://arxiv.org/abs/1812.10056v1 Date accepted: 2019-01-17 Date submitted: 2018-12-27 Submitted by: Zhang, Jianyong Submitted to: SciPost Physics Proceedings Proceedings issue: The 15th International Workshop on Tau Lepton Physics (Amsterdam, 2018-09) Discipline: Physics Subject area: High-Energy Physics - Experiment Approach: Experimental

### Abstract

In order to obtain the mass of $\tau$ lepton at BESIII precisely, a beam energy measurement system was built at BEPCII. A scenario for high precision $\tau$ mass measurement was put forth before data taken. More than 130 $pb^{-1}$ $\tau$ mass scan data were collected in April 2018, and the uncertainty of $m_{\tau}$ is expected to be less than 100 keV.

### Submission & Refereeing History

Resubmission 1812.10056v1 on 27 December 2018
Submission scipost_201811_00024v1 on 15 November 2018