Comprehensive measurement of $\hat{I}{\cdot }^{\prime }$ photoproduction off the proton at $E_{\hat{I}}^3<2.4$ $\mathrm{GeV}$

Abstract

For the spectroscopy of nucleon resonances at the total energies from the $\hat{I}{\cdot }^{\prime }$-meson production threshold to $2.32$ $\mathrm{GeV}$, photon beam asymmetries of the reaction ${\hat{I}}^{3}p\to \hat{I}{\cdot }^{\prime }p$ were measured together with total and differential cross sections by analyzing the two decay modes $\hat{I}{\cdot }^{\prime }\to {\hat{I}}^3{\hat{I}}^3$ and $\ddot{I}{€}^0\ddot{I}{€}^0\hat{I}\cdot$. New constraints for amplitude decomposition were given by the first-time result of photon beam asymmetries at $E_{\hat{I}}^3>1.84$ $\mathrm{GeV}$ and the most precise data of differential cross sections to date at extremely backward $\hat{I}{\cdot }^{\prime }$ angles. The possibility of a larger coupling constant of the $\hat{I}{\cdot }^{\prime }$-nucleon system to the $N(2250)$ resonance was implied in the partial wave analyses using the present data.

7 pages, 5 figures