Antiproton-proton annihilation into π0ηη has been studied with the Crystal Barrel spectrometer at CERN at an incident beam momentum of 1.94GeV/c. The data were taken with a trigger requiring neutral final states. A new isovector state, the a2(1660) decaying to π0η, is observed. In the ηη invariant mass region around 2.1 GeV/c2, strong production of a heavy resonance is required, but our analysis does not distinguish between JP = 0+, 2+ and 4+. The production of the f0(1500) in reactions in flight is also observed.
ASJC Scopus subject areas
- Engineering (miscellaneous)
- Physics and Astronomy (miscellaneous)