Search for substructure in pp total cross section in the 2200 MeV mass region

Abstract The p p total cross section was measured from 2130 to 2250 MeV with mass resolution 2.25 MeV (FW). No fine structure was found with σΓ above the statistical limit of 7 MeV mb. A spin J particle coupled to the p p system must have partial width less than 1.8 (2J+1) MeV.