Evidence for a new resonance θ→ηη in the process Jψ→γηη is presented. The resonance parameters of the θ are M=1640±50 MeV and Γ=220−70+100 MeV. JPC=2++ is preferred over 0++.
DOI:https://doi.org/10.1103/PhysRevLett.48.458
©1982 American Physical Society
Vol. 48, Iss. 7 — 15 February 1982
Sign up to receive regular email alerts from Physical Review Letters