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

TL;DR

This paper models high-energy deuteron photodisintegration via quark rescattering, linking it 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 two-body photodisintegration of the deuteron, integrating scattering amplitudes with the deuteron wave function.

Findings

Computed cross sections agree with experimental data

Rescattering amplitude depends on convolution of scattering and wave functions

Model provides a QCD-based explanation for high-energy deuteron breakup

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 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 cross sections are in reasonable agreement with the data.