Using familiar methods of exclusive QCD, we derive the amplitude for the coupling of J=1 quarkonium D-states to proton-antiproton pairs. Including the 3D1 contribution, we then evaluate the Ψ′ →pp decay width and find that the |2 3S1〉-|1 3D1〉 mixing angle solution φ=-(28±2)° is favored by the observed Ψ′ decay rate. Using this solution, we then find that Γ(Ψ″→p p)/Γ(Ψ→pp) is in the range 0.07-0.31 depending on the assumed nucleon wavefunction.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics