https://doi.org/10.1140/epjc/s2004-01812-7
experimental physics
Dynamical selection rules from 
annihilation at restin three meson final states
The hadronic annihilation branching-ratios in quasi-two-body final states have been obtained from the observation of the reactions 
, 
at rest in hydrogen targets at different densities. The enhancement or suppression of specific hadronic channels connected to dynamical selection rules is observed in the production of different resonances both in protonium S and P-waves, systematically investigated for the first time. Besides the well known 
and 
enhancement from 3
S
1 and 1
S
0 partial waves, the dominance of one isospin source in 
production, well established from S-waves, is confirmed also in P-waves (1
S
0, I = 0; 3
S
1, I = 1; 1
P
1, I = 0; 3
P
1, I = 0; 3
P
2, I = 1). In addition, the experimental data clearly show a strong suppression of 
and 
final states from P-wave which has a remarkable coincidence with pattern production.
© Springer-Verlag, 2004
