Search

The reaction K+n → K+π-p has been measured at CERN-PS using the CERN transversely polarized deuteron target at 5.98 and 11.85 GeV/c incident momentum. The data are analysed in the dimeson mass region 0.812 ≤ m(K+π-) ≤ 0.972 GeV and momentum transfer 0.1 ≤ |t| ≤ 1.0 (GeV/c)2 with the assumption that only S- and P- waves contribute. We present the first measurement of the 9 target polarization dependent observables. The 5 polarization independent observables are in agreement with existing data. The improved statistics permits verification of additive quark model predictions with better precision.

In an experiment carried out at the CERN-PS the reaction π+n ↑ → π+π-p has been studied using the CERN polarized deuteron target. Assuming that only S- and P-waves contribute to the angular distribution for dipion masses ≲ 1 GeV, the experiment yields 14 linearly independent observables which allow model independent amplitude analysis. The experiment contributes new information on the energy dependence and also on the mass-dependence of dipion production at |t| ≳ 0.3 where natural exchange is found to dominate.