Elasticp−pscattering at 796 MeV in the Coulomb-nuclear interference region

Abstract

By measuring the energy of recoil particles, the following data have been obtained at an incident proton energy of 796 MeV: (1) the differential cross section for proton-proton ($p\ensuremath{-}p$) elastic scattering at laboratory angles between 1.37\ifmmode^\circ\else\textdegree\fi{} and 6.40\ifmmode^\circ\else\textdegree\fi{}, and (2) the analyzing power for $p\ensuremath{-}p$ elastic scattering at laboratory angles between 3.13\ifmmode^\circ\else\textdegree\fi{} and 6.40\ifmmode^\circ\else\textdegree\fi{}. Analyses of these data have determined certain parameters characterizing the nuclear amplitude for $p\ensuremath{-}p$ elastic scattering. The ratio $\ensuremath{\rho}$ of the real to the imaginary parts of the forward $p\ensuremath{-}p$ spin independent amplitude was found to be + 0.005\ifmmode\pm\else\textpm\fi{}0.04. The ratio $R$ of the summed moduli squared of the forward $p\ensuremath{-}p$ double spin flip scattering amplitudes to the modulus squared of the forward $p\ensuremath{-}p$ spin independent amplitude was found to be 0.16\ifmmode\pm\else\textpm\fi{}0.03. The real and imaginary parts of the $p\ensuremath{-}p$ spin orbit scattering amplitude divided by $sin\ensuremath{\theta}$ were found to be 0.72\ifmmode\pm\else\textpm\fi{}0.05 and 0.18\ifmmode\pm\else\textpm\fi{}0.11 fm, respectively. These values are compared with results of recent phase-shift analyses and forward dispersion relation calculations.NUCLEAR REACTIONS $^{1}\mathrm{H}$($p$,$p$)$^{1}\mathrm{H}$, $E=796$ MeV, measured $\ensuremath{\sigma}(t)$ and ${A}_{y}(t)$.