Neutrons and the New Standard Model

TL;DR

This paper reviews how neutron-based experiments, including electric dipole moment searches and decay studies, can reveal new physics beyond the current Standard Model, complementing collider and other low-energy tests.

Contribution

It highlights the potential of neutron experiments to uncover new fundamental symmetries and interactions, emphasizing their complementarity with other search methods.

Findings

Neutron EDM searches relate to baryogenesis.

Precision neutron decay studies can detect new symmetries.

Complementarity enhances the search for new physics.

Abstract

Fundamental symmetry tests with neutrons can provide unique information about whatever will be the new Standard Model of fundamental interactions. I review two aspects of this possibility: searches for the permanent electric dipole moment of the neutron and its relation to the origin of baryonic matter, and precision studies of neutron decay that can probe new symmetries. I discuss the complementarity of these experiments with other low-energy precision tests and high energy collider searches for new physics.