The Theory of Parity Violation in Few-Nucleon Systems

TL;DR

This paper reviews recent theoretical progress in understanding hadronic parity violation in systems with up to five nucleons, highlighting methods, calculations, and future research directions.

Contribution

It provides a comprehensive overview of existing theoretical approaches, especially effective field theory, for studying parity violation in few-nucleon systems.

Findings

Summarizes methods used in parity violation calculations

Details available calculations for systems with up to five nucleons

Identifies gaps and future needs in theoretical research

Abstract

We review recent progress in the theoretical description of hadronic parity violation in few-nucleon systems. After introducing the different methods that have been used to study parity-violating observables we discuss the available calculations for reactions with up to five nucleons. Particular emphasis is put on effective field theory calculations where they exist, but earlier and complementary approaches are also presented. We hope this review will serve as a guide for those who wish to know what calculations are available and what further calculations need to be completed before we can claim to have a comprehensive picture of parity violation in few nucleon systems.