QCD Rescattering and High Energy Two-Body Photodisintegration of the Deuteron

TL;DR

This paper models high-energy deuteron photodisintegration by summing quark rescattering diagrams, linking the process to large-angle nucleon scattering and the deuteron wave function, with results aligning with experimental data.

Contribution

It introduces a quark rescattering framework for high-energy deuteron photodisintegration, connecting quark-level interactions with nucleon scattering data.

Findings

Computed cross sections agree with experimental measurements.

The scattering amplitude depends on a convolution of nucleon scattering and deuteron wave function.

The model provides a plausible explanation for high-energy two-body photodisintegration.

Abstract

Photon absorption by a quark in one nucleon followed by its high momentum transfer interaction with a quark in the other may produce two final-state nucleons with high relative momentum. We sum the relevant quark rescattering diagrams, to show that the scattering amplitude depends on a convolution between the large angle $pn$ scattering amplitude, the hard photon-quark interaction vertex and the low-momentum deuteron wave function. The computed absolute values of the cross section are in reasonable agreement with the data.