Abstract
The ${}^{2}\mathrm{H}(\ensuremath{\gamma},pp{\ensuremath{\pi}}^{\ensuremath{-}})$ reaction cross section has been measured in the energy range 220 $\mathrm{MeV}<~{E}_{\ensuremath{\gamma}}<~280$ MeV at the Saskatchewan Accelerator Laboratory using the Saskatchewan-Alberta Large Acceptance Detector. This is the first reported measurement of the ${\ensuremath{\gamma}}^{2}\stackrel{\ensuremath{\rightarrow}}{H}\mathrm{pp}{\ensuremath{\pi}}^{\ensuremath{-}}$ cross section covering a wide range of phase space in an attempt to study final state interactions. The cross section for this reaction is compared to the calculation of Blomqvist and Laget with various contributions from final state interactions. Blomqvist and Laget's theory is successful in describing the shapes of the distributions, as well as the overall magnitude of the cross section. The different final state interactions have an overall effect of 10%--15% on the single differential cross section, with the calculation that includes the $\ensuremath{\Delta}\ensuremath{-}N$ interaction having the best agreement with the data.
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