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

msra（1999）

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摘要

. Antiproton–proton annihilation into has been studied with the Crystal Barrel spectrometer at CERN at an incident beam momentum of 1.94 GeV/c. The data were taken with a trigger requiring neutral final states. A new isovector state, the decaying to , is observed. In the invariant mass region around 2.1 GeV/, strong production of a heavy resonance is required, but our analysis does not distinguish between , and . The production of the in reactions in flight is also observed.

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Observation of resonances in the reaction at 1.94 GeV/

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