Parity violation in $d \vec{\gamma} -> np$ with pionless effective theory

TL;DR

This paper develops a pionless effective theory with dibaryon fields to analyze parity violation in deuteron photodisintegration, providing a framework to relate weak coupling constants to observable effects.

Contribution

It introduces a leading order Lagrangian with nucleon-dibaryon weak couplings for describing parity-violating processes in two-nucleon systems.

Findings

Derived an expression for the observable in deuteron photodisintegration at threshold.

Connected the observable to nucleon-dibaryon weak coupling constants.

Discussed the relation to previous theoretical calculations.

Abstract

We consider a pionless effective theory with dibaryon fields for the description of the weak process involving two nucleons. We construct leading order Lagrangians that contain nucleon-dibaryon weak coupling constants. We calculate the physical observable in the photodisintegration of the deuteron at threshold and obtain the result in terms of the nucleon-dibaryon weak coupling constants. Relation to existing calculations is discussed.