The hadronic annihilation branching-ratios in quasi-two-body final states have been obtained from the observation of the reactions p̄p→π +π -π 0, K +K -π 0, K ±π ∓K 0 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 ρ(770)π and a 2(1320)π enhancement from 3S 1 and 1S 0 partial waves, the dominance of one isospin source in K*(892)K̄ production, well established from S - waves, is confirmed also in P - waves ( 1S 0, I = 0; 3S 1, I = 1; 1P 1, I = 0; 3P 1, I = 0; 3P 2, I = 1). In addition, the experimental data clearly show a strong suppression of φ(1020)π and a 0(980)π final states from P - wave which has a remarkable coincidence with K*(892)K̄ pattern production.
|Titolo:||Dynamical selection rules from pp̄ annihilation at rest in three meson final states|
|Data di pubblicazione:||2004|
|Digital Object Identifier (DOI):||10.1140/epjc/s2004-01812-7|
|Appare nelle tipologie:||1.1 Articolo in rivista|