Total and Partial Photoproduction Cross Sections at 1.44, 2.8, and 4.7 GeV

A nearly monochromatic high-energy photon beam produced by Compton backscattering of ruby laser light has been used to study photoproduction in a hydrogen bubble chamber. The total hadronic $\ensuremath{\gamma}p$ cross sections at 1.44, 2.8, and 4.7 GeV are found to be 145.1 \ifmmode\pm\else\textpm\fi{} 5.7, 131.3 \ifmmode\pm\else\textpm\fi{} 4.3, and 124.2 \ifmmode\pm\else\textpm\fi{} 3.9 \ensuremath{\mu}b, respectively. Partial cross sections are presented also.