Electroweak Results from the SLD Experiment

TL;DR

The SLD experiment at SLAC collected 550,000 Z0 decays to measure electroweak parameters like the weak mixing angle and parity violation, testing the Standard Model with high precision.

Contribution

This paper reports new precise measurements of electroweak parameters using polarized electron beams and advanced detectors at the SLD experiment.

Findings

Weak mixing angle sin2(thetaw)=0.23110 ± 0.00029

Parity violating parameter A_b=0.898 ± 0.029

Results consistent with Standard Model predictions

Abstract

We present an overview of the electroweak physics program of the SLD experiment at the Stanford Linear Accelerator Center (SLAC). A data sample of 550K Z0 decays has been collected. This experiment utilizes a highly polarized electron beam, a small interaction volume, and a very precise pixel vertex detector. We present a preliminary result for the weak mixing angle, sin2(thetaw)=0.23110 +- 0.00029. We also present a preliminary result for the parity violating parameter, A_b = 0.898 +- 0.029. These measurements are used to test for physics beyond the Standard Model.