# The 16th International Workshop on Tau Lepton Physics (TAU2021) (Virtual Edition)

September 27, 2021 to October 1, 2021
Indiana University
America/Indiana/Indianapolis timezone

## Physics Prospects of Beam Polarization at Belle II

Oct 1, 2021, 3:35 PM
25m
Virtual (Indiana University)

### Virtual

#### Indiana University

Oral contribution Tau2021 Abstracts

### Speaker

Michael Roney (University of Victoria)

### Description

Having the SuperKEKB e+e- collider upgraded with a polarized e- beam is under consideration, providing a unique program of precision electroweak and other physics at 10.6 GeV, thereby opening exciting new windows in search of new physics. Measurements of left-right asymmetries ($A_{LR}$) of e+e- transitions to pairs of taus, muons, electrons, c- and b-quarks would yield improvements to the determination of $\sin^2\theta_W$ compared to those made at the Z-pole precision but at much lower energy. These will probe the running and universality of neutral current couplings with unprecedented precision, opening new ways to search for dark sector effects. Other tau and QCD physics is also enhanced. This paper will focus on the physics prospects with a special emphasis on tau physics.

What is your topic? Future opportunities in Tau Physics

### Primary author

Michael Roney (University of Victoria)

### Presentation materials

 ChiralBelle-Tau2021-1Oct2021.pdf VideoTau2021_Roney.mp4