1993/11/20 by F. J. Yndurain, F.J. Ynduráin · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1016/0370-2693(94)90266-6
published as Phys.Lett.B321:400-406,1994 · 12 pages, preprint FTUAM 38/93
arxiv created 1993/11/20 · openalex publication_date 1994/02/01 · arxiv updated 2010/11/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
A detailed evaluation is presented of production of heavy fermions (particularly ttbar quarks) by a vector current, in the region around threshold. This includes bound states as well as the region above threshold, to the same degree of accuracy; in both cases radiative and nonperturbative corrections are included. The contribution of this region to the vacuum polarization (``threshold effects'') is calculated and compared with a perturbative calculation; the importance of the threshold effects is found substantially smaller than claimed by some authors. Open fermion-antifermion production is also discussed.