New results on heavy quarks near threshold

1998/06/21 by Μ. Beneke, M. Beneke, Beneke, M. · 2 citations
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9806429

Talk presented at the XXXIIIrd Rencontres de Moriond `Electroweak Interactions and Unified Theories', 14-21 March 1998, Les Arcs, France; 12 pages, LaTeX, 1 figures, .sty files included, (v2): mistyped CF CA term in Eq. (12) fixed

openalex publication_date 1998/06/21 · arxiv created 1998/06/25 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We review in brief the threshold expansion, a method to perform the expansion of Feynman integrals near the heavy quark-antiquark threshold, and its relation to the construction of two effective theories, non-relativistic QCD (NRQCD) and potential-NRQCD. We then summarize recent next-to-next-to-leading order results on the decay J/Ψ→ l⁺ l^-, the bottom quark mass from Υ sum rules and the top-anti-top production cross section near threshold in e⁺ e^- collisions.

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