Proton-deuteron elastic scattering at 800 MeV

Abstract

Differential cross sections and polarization analyzing powers for proton-deuteron elastic scattering have been measured at 800 MeV incident proton kinetic energy over the range of center-of-mass angles from 14.1\ifmmode^\circ\else\textdegree\fi{} to 153.6\ifmmode^\circ\else\textdegree\fi{}. The differential cross sections are described by the Glauber theory of impulse approximation at forward angles ($\ensuremath{-}t<0.5$) and exhibit the exponential dependence on ${cos\ensuremath{\theta}}_{\mathrm{c}.\mathrm{m}.}$ typical for these energies at backward angles (${cos\ensuremath{\theta}}_{\mathrm{c}.\mathrm{m}.}<\ensuremath{-}0.5$). The analyzing power shows considerable structure with strong positive peaks at forward and backward angles and a sharp dip at $t=\ensuremath{-}0.4$ typical at intermediate energies. There is no evidence for correspondence of the angular dependence of the analyzing power with that for the $\mathrm{pp}\ensuremath{\rightarrow}d{\ensuremath{\pi}}^{+}$ reaction. At large momentum transfer the data favor calculations based on multiple scattering with a modified deuteron form factor rather than ${N}^{*}$ exchange.NUCLEAR REACTIONS $^{2}\mathrm{H}$($p$,$p$)$^{2}\mathrm{H}$, $E=800$ MeV, measured $\ensuremath{\sigma}(\ensuremath{\theta})$ and ${A}_{y}(\ensuremath{\theta})$.