Comparison of the reaction at rest in hydrogen and deuterium. A test of S-state annihilation dominance

From the comparison of the frequency of antiproton annihilation at rest in two mesons in H2 and D2, the dominance of S-wave in pp annihilation at rest is confirmed, the P-wave contribution being less than 6% at the 95% confidence level. The apparent discrepancy between the channels pp→K0K0 and pp→ππ is due to the strong dependence of the annihilation dynamics from the angular momentum.