Differential cross sections for the reactions gamma p-> p eta and gamma p -> p eta-prime

TL;DR

This paper presents high-precision differential cross section measurements for gamma p -> p eta and gamma p -> p eta-prime reactions across a broad energy range, aiding baryon resonance studies.

Contribution

It provides the most precise eta-prime data to date with extensive energy and angular coverage, extending eta measurements and supporting resonance analysis.

Findings

Most precise eta-prime cross sections to date

Extended eta measurements by ~300 MeV at large angles

Data will help constrain baryon resonance models

Abstract

High-statistics differential cross sections for the reactions gamma p -> p eta and gamma p -> p eta-prime have been measured using the CLAS at Jefferson Lab for center-of-mass energies from near threshold up to 2.84 GeV. The eta-prime results are the most precise to date and provide the largest energy and angular coverage. The eta measurements extend the energy range of the world's large-angle results by approximately 300 MeV. These new data, in particular the eta-prime measurements, are likely to help constrain the analyses being performed to search for new baryon resonance states.