Observation of a 1750 MeV narrow meson decaying into ηη
Physics Letters B(1986)
Abstract
A narrow meson which decays into ηη is observed in 38 GeV/c π−p collisions at large momentum transfer. The experiment has been performed at the Serpukhov accelerator with the GAMS-2000 spectrometer. The mass of this new meson is (1755 ± 8) MeV, its width is less than 50 MeV. Its spin-parity is JPC=0++ or less probably 2++.
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