Polarization of the neutron induced from hadronic weak interactions in the photo-disintegration of the deuteron

TL;DR

This paper investigates how neutron polarization in deuteron photo-disintegration reveals parity-violating two-nucleon weak interactions, using effective field theory to connect observables with fundamental weak interaction parameters.

Contribution

It introduces new observables for studying hadronic weak interactions and provides numerical calculations linking neutron polarization to parity-violating constants.

Findings

Neutron polarization depends on parity-violating interactions.

Results expressed as linear combinations of unknown low energy constants.

Implications for understanding hadronic weak interactions.

Abstract

New observables with which we can study the two-nucleon weak interactions at low energies are considered. In the breakup of the deuteron by photons, polarization of outgoing neutrons can depend on the parity-violating component of two-nucleon interactions. We express the parity-violating polarization in general forms, and perform numerical calculations with a pionless effective field theory. The theory has unknown parity-violating low energy constants, and the results are expressed in linear combination of them. We discuss the results and their implication to the understanding of the hadronic weak interactions.