Radiative decays of the and evidence for a new heavy resonance

W. Braunschweig, H.-U. Martyn, H.G. Sander, D. Schmitz, W. Sturm, W. Wallraff, K. Berkelman, D. Cords, R. Felst, E. Gadermann, H. Hultschig, P. Joos (+28 others)
1977 Physics Letters B  
doi:10.1016/0370-2693(77)90114-9 fatcat:ahtjbv3fufhhvme5xvp65hs4xa