Summary
In a high-statistics experiment (200 events/nanobarn) performed at the 70 GeV IHEP accelerator, a new dipion resonance has been observed in π−p collisions at 38 GeV/c momentum. The gamma-rays in reaction π−p → M0n, M0 → π0π0 → 4γ have been detected in the hodoscope spectrometer GAMS-2000. The new meson, r(2510), has a mass (2510±30) MeV/c2, a width (240±60) MeV/c2 and spin-parityJ PC=6++. The production cross-section of the f, h and r mesons decreases exponentially with spin like exp [−0.9J].
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IHEP Collaboration., Donskov, S.V., Inyakin, A.V. et al. Observation of a spin-6 neutral meson r(2510). Lett. Nuovo Cimento 39, 41–48 (1984). https://doi.org/10.1007/BF02813857
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DOI: https://doi.org/10.1007/BF02813857