Observation of a Spin 4 Neutral Meson with 2-GeV Mass Decaying in pi0 pi0

The invariant mass spectrum of neutral meson states from π − p interactions at 40 GeV/ c incident momentum has been investigated in a high statistics experiment performed at the 70 GeV IHEP accelerator. To detect the high energy photons coming from the produced neutral states, a hodoscope spectrometer with a computer on-line was used. A clear structure on the mass spectrum of dipions produced in the reaction π − p→π°π°n is observed at 2 GeV. The decay angular distributions show in this mass region the variation with mass typical of a state with a spin J = 4. The mass of the observed meson is found to be M = (2020±30)MeV and the estimate of the full width is (180±60) MeV.

PI- P: INTERACTION
INTERACTION: PI- P
MASS SPECTRUM: (2PI0)
H(2050): PRODUCTION
PRODUCTION: H(2050)
H(2050): DECAY
DECAY: H(2050)
PI0: FINAL STATE
FINAL STATE: PI0
N: FINAL STATE

References(8)

Figures(0)

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