Multipion Production in Deuteron-Deuteron Interactions at 7.9GeVc

Pion pair production is studied in the pure state of isospin $T=0\mathrm{}$ using the reaction $\mathrm{dd}\to \mathrm{dd}\pi \pi$ in a bubble chamber experiment. The data are compared in detail with a one-pion-exchange and a Reggeized one-pion-exchange model including proper Bose symmetrization and the effects of the deuteron spin. No additional $\pi \pi$ interaction is necessary to explain our data. A $\pi \pi$ mass plot in bins close to our experimental resolution is presented as an incentive for bump hunters.