Study of Electroweak Interactions at the Energy Frontier

TL;DR

This paper reviews precision electroweak measurements, focusing on key observables like M_W and sin^2 theta_eff^l, and explores their potential to reveal new physics at current and future colliders.

Contribution

It provides a comprehensive analysis of the precision needed in electroweak measurements to detect deviations from the Standard Model and discusses tools for accurate predictions.

Findings

Identifies key electroweak observables sensitive to new physics.

Analyzes the precision thresholds for future collider experiments.

Summarizes tools for accurate SM rate predictions.

Abstract

With the discovery of the Higgs boson, the spectrum of particles in the Standard Model (SM) is complete. It is more important than ever to perform precision measurements and to test for deviations from SM predictions in the electroweak sector. In this report, we investigate two themes in the arena of precision electroweak measurements: the electroweak precision observables (EWPOs) that test the particle content and couplings in the SM and the minimal supersymmetric SM, and the measurements involving multiple gauge bosons in the final state which provide unique probes of the basic tenets of electroweak symmetry breaking. Among the important EWPOs we focus our discussion on M_W and sin^2 theta_eff^l, and on anomalous quartic gauge couplings probed by triboson production and vector boson scattering. We investigate the thresholds of precision that need to be achieved in order to be sensitive to new physics. We study the precision that can be achieved at various facilities on these observables. We discuss the calculational tools needed to predict SM rates and distributions in order to perform these measurements at the required precision. This report summarizes the work of the Energy Frontier Precision Study of Electroweak Interactions working group of the 2013 Community Summer Study (Snowmass).