2015/06/30 by Y. Kiyo, G. Mishima, Y. Sumino
Physics and Astronomy · #Collider #Dominance (genetics) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #Quarkonium #Renormalon #Top quark #hep-ph
paper · pdf · doi:10.1007/jhep11(2015)084
published as JHEP 11 084 (2015) · 17 pages, 7 figures, 3 tables; Revisions in ver.2: We added (i) a more conservative error estimate of m_t determination, (ii) discussion on u=+1 and u=-1 renormalons, (iii) interpretation of PS-scheme
openalex publication_date 2015/11/01 · arxiv created 2015/11/19 · arxiv updated 2015/11/20 · openalex created_date 2020/11/23 · openalex updated_date 2026/08/05
Combining recent perturbative analyses on the static QCD potential and the quark pole mass, we find that, for the heavy quarkonium states cc , bb and tt , (1) ultra-soft (US) corrections in the binding energies are small, and (2) there is a stronger cancellation of IR contributions than what has been predicted by renormalon dominance hypothesis. By contrast, for a hypothetical heavy quarkonium system with a small number of active quark flavors (n l ≈ 0), we observe evidence that renormalon dominance holds accurately and that non-negligible contributions from US corrections exist. In addition, we examine contributions of renormalons at u = −1. As an important consequence, we improve on a previous prediction for possible achievable accuracy of top quark MS -mass measurement at a future linear collider and estimate that in principle 20-30 MeV accuracy is reachable.