Parity nonconservation in deuteron photoreactions

TL;DR

This paper calculates parity nonconservation asymmetries in deuteron photoreactions using various nuclear potentials and weak couplings, providing detailed theoretical predictions for experiments involving polarized photons and neutrons.

Contribution

It introduces a comprehensive theoretical framework for analyzing parity nonconservation in deuteron photoreactions, including Delta-isobar excitation effects and comparisons of different nuclear potentials and weak couplings.

Findings

Asymmetries calculated for photon energies up to 10 MeV.

Comparison of results using Reid93 and Argonne v18 potentials.

Inclusion of Delta(1232)-isobar excitation effects.

Abstract

We calculate the asymmetries in parity nonconserving deuteron photodisintegration due to circularly polarized photons gamma+d to n+p with the photon laboratory energy ranging from the threshold up to 10 MeV and the radiative capture of thermal polarized neutrons by protons n+p to gamma+d. We use the leading order electromagnetic Hamiltonian neglecting the smaller nuclear exchange currents. Comparative calculations are done by using the Reid93 and Argonne v18 potentials for the strong interaction and the DDH and FCDH "best" values for the weak couplings in a weak one-meson exchange potential. A weak NDelta transition potential is used to incorporate also the Delta(1232)-isobar excitation in the coupled-channels formalism.