With antiprotons stopped in liquid deuterium, the ̄pn annihilation channel π- π0η was studied using a final sample of 52576 events obtained for a spectator proton momentum < 100 MeV/c. In the intensity distribution the ηπ P-wave is clearly apparent by its interferences with the dominant p-(770) and a2(1320) two-meson resonances. A partial wave analysis of the data yields evidence for resonant behaviour of the ηπ P-wave, which has the non-q̄q quantum numbers IG = 1-, JPC = 1-+. The extracted Breit-Wigner resonance parameters are m = (1400 ± 20 ± 20) MeV/c2 and Γ = (310 ± 50-30+50) MeV/c2.
|Number of pages||10|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - Mar 19 1998|
ASJC Scopus subject areas
- Nuclear and High Energy Physics