Tests of the Standard Model at the International Linear Collider

TL;DR

The paper reviews the International Linear Collider's potential for high-precision tests of the Standard Model, including electroweak measurements, fermion production, and Higgs boson properties, to explore physics beyond current knowledge.

Contribution

It provides updated projections for electroweak and Higgs measurements at the ILC, highlighting its enhanced capabilities for probing the Standard Model and new physics.

Findings

Improved precision in electroweak observables from W and Z measurements.

Enhanced accuracy in fermion pair production, including b and t quarks.

Refined projections for Higgs boson coupling determinations and self-coupling measurements.

Abstract

We present an overview of the capabilities that the International Linear Collider (ILC) offers for precision measurements that probe the Standard Model. First, we discuss the improvements that the ILC will make in precision electroweak observables, both from W boson production and radiative return to the Z at 250 GeV in the center of mass and from a dedicated GigaZ stage of running at the Z pole. We then present new results on precision measurements of fermion pair production, including the production of b and t quarks. We update the ILC projections for the determination of Higgs boson couplings through a Standard Model Effective Field Theory fit taking into account the new information on precision electroweak constraints. Finally, we review the capabilities of the ILC to measure the Higgs boson self-coupling.