Differential cross sections for the reactions $\ensuremath{\gamma}p\ensuremath{\rightarrow}p\ensuremath{\eta}$ and $\ensuremath{\gamma}p\ensuremath{\rightarrow}p{\ensuremath{\eta}}^{'}$

Differential cross sections for the reactions $γ p \to p η$ and $γ p \to p η^{'}$

M. Williams et al. (CLAS Collaboration)

Phys. Rev. C 80, 045213 – Published 29 October 2009

Abstract

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