The γγ signal of pseudoscalar t'- Quarkonium at the SSC

If the fourth generation quark mass splitting is small, the pseudoscalar quarkonium state, eta/sub t'/, is produced with large cross sections in hadron colliders. The decay mode eta/sub t'/ → γγ is enhanced by a factor 16 relative to the eta/sub b'/ → γγ decay, and for masses M/sub eta/t' < O(500 GeV), leads to a rate of two photon events that is observable above the qq-bar → γγ background for high luminosity rhorho collisions at √s = 40 TeV if a mass resolution of +- 2% is attainable