Abstract

Efforts to describe hadronic parity violation in few-nucleon systems using effective field theories are described. Particular emphasis is given to observables in two- and three-nucleon systems and their relation to ongoing experimental efforts. The role of parityviolating three-nucleon interactions is also discussed.

Highlights

  • Parity-violating (PV) interactions of hadrons are the manifestation of an interplay of strong and weak interactions between quarks inside the hadrons

  • The development of high-intensity sources and advances in the control of systematics have led recent efforts to be focussed on the detection of parity violation in few-nucleon systems

  • Because of their origin in an interplay between short-distance weak interactions and nonperturbative QCD, PV interactions between nucleons provide a unique probe of our understanding of the standard model

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Summary

Introduction

Parity-violating (PV) interactions of hadrons are the manifestation of an interplay of strong and weak interactions between quarks inside the hadrons (for recent reviews see, e.g., Refs. [1, 2]). Parity-violating (PV) interactions of hadrons are the manifestation of an interplay of strong and weak interactions between quarks inside the hadrons For the case of nucleon-nucleon (NN) interactions, the PV component is expected to be suppressed by a factor of about 10−6 to 10−7 compared to the dominant parity-conserving (PC) part These small effects can be isolated by considering observables that would vanish if parity was conserved. Most of the corresponding experiments are related to processes at very low energies, e.g., the capture of cold neutrons At these energies, effective field theories (EFT) provide a model-independent framework to analyze and interpret data, and to give theoretical uncertainty estimates. One possible approach is given by lattice QCD [3]

Parity violation in pionless EFT
Two-nucleon systems
Three-nucleon systems
Few-nucleon systems
Findings
Conclusions and outlook
Full Text
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