1994/08/03 by W. Kummer, Kummer, W., W. Moedritsch +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9408220
4 pages, TUW-94-15
arxiv created 1994/08/03 · arxiv updated 2009/11/30
Although individual levels of toponium will be unobservable, the top--anti--top system near threshold fulfills all requirements of a rigorous perturbation theory in QCD for weakly bound systems. Corresponding techniques from positronium may thus be transferred successfully to this case. After clarifying the effect of a non-zero width we calculate the tt potential to be used for the calculation of e.g. the cross-sections near threshold.