2023 Impact factor 4.2
Particles and Fields
Eur. Phys. J. C 8, 67-79
DOI 10.1007/s100529901069

Observation of resonances in the reaction $\bar{{p}}{p}$ $\rightarrow \pi^0\eta\eta$at 1.94$\,{GeV}/c$

The CRYSTAL BARREL Collaboration

A. Abele 8 - et al.

8 Universität Karlsruhe, D-76021 Karlsruhe, Germany

Received: 19 July 1998 / Published online: 19 February 1999

Antiproton-proton annihilation into $\pi^0\eta\eta$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 $\pi^0\eta$, is observed. In the $\eta\eta$ invariant mass region around 2.1$\,{GeV}/c^{2}$, 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.

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