Differential Cross Section for $\gamma d \rightarrow \omega d$ using CLAS at Jefferson Lab

TL;DR

This paper reports the first measurement of the differential cross section for coherent omega-meson photoproduction off deuterons across a range of energies and momentum transfers, providing insights into omega-nucleon interactions.

Contribution

It presents the first experimental measurement of the cross section for $oldsymbol{ ext{γ}d ightarrow oldsymbol{ ext{ω}}d}$ and analyzes omega-nucleon scattering within a theoretical framework.

Findings

Cross sections measured for photon energies 1.4-3.4 GeV.

Model based on omega-N rescattering fits the data.

Omega-N total cross section estimated at 30-40 mb.

Abstract

The cross section for coherent $\omega$-meson photoproduction off the deuteron has been measured for the first time as a function of the momentum transfer $t = (P_{\gamma}-P_{\omega})^2$ and photon energy $E_{\gamma}$ using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The cross sections are measured in the energy range $1.4 < E_{\gamma} < 3.4$ GeV. A model based on $\omega-N$ rescattering is consistent with the data at low and intermediate momentum transfer, $|t|$. For $2.8 < E_{\gamma} < 3.4$ GeV, the total cross-section of $\omega-N$ scattering, based on fits within the framework of the Vector Meson Dominance model, is in the range of 30-40 mb.