Test of advanced Faddeev calculations and search for three-body force effects in the reactionH2(parrow,pp)n atEp=14.1MeV

Differential cross section and analyzing power of the breakup reaction ${}_{}{}^2{}_{}{}^{}\mathrm{H}$(parrow,pp)n have been measured in a kinematically complete coincidence experiment for two selected kinematical configurations, the final state interaction and the collinear configuration with the neutron at rest in the c.m. system. Faddeev calculations done with a code by Stuivenberg and in particular with a recent code by Doleschall show good agreement with the data. Even in the collinear case which is assumed to be most sensitive to effects of the three-body force, no influence of three-body forces is observed. Their contribution therefore cannot exceed the experimental error of 2–3 %. The results indicate that contributions from P and D waves as well as the tensor force are more important than effects from a three-body force.