production of charmonium states by resonant pp̄ annihilation

Robert N. Cahn, Mahiko Suzuki
1980 Physics Letters B  
Cross sections are estimated for the production of charmonium states in pp annihilation on resonance. For processes like pp ->-nc ->-yy the cross sections are about 1 nb. Non-resonant contributions are estimated and found
doi:10.1016/0370-2693(80)90121-5 fatcat:tkx6vvhuirhj7itn6egoiwjnqu