Quarkonium spectroscopy and perturbative QCD: a new perspective

2001/01/31 by Nora Brambilla, N. Brambilla, Y. Sumino +2 · 5 citations
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/s0370-2693(01)00611-6

published as Phys.Lett.B513:381-390,2001 · 12 pages, 2 figures; Discussion on ultra-soft effects included; Some conservative error estimates added; Version to appear in Phys.Lett.B

arxiv created 2001/05/07 · openalex publication_date 2001/08/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study the energy spectrum of bottomonium in perturbative QCD, taking alpha_s(Mz)=0.1181 +/- 0.0020 as input and fixing m_b^MSbar(m_b^MSbar) on the Upsilon(1S) mass. Contrary to wide beliefs, perturbative QCD reproduces reasonably well the gross structure of the spectrum as long as the coupling constant remains smaller than one. We perform a detailed analysis and discuss the size of non-perturbative effects. A new qualitative picture on the structure of the bottomonium spectrum is provided. The lowest-lying (c,cbar) and (b,cbar) states are also examined.

Citations

• Renormalon Cancellation in Heavy Quarkonia and Determination of m_b, m_t
• Potential NRQCD: an effective theory for heavy quarkonium
• Bdecays in the upsilon expansion
• Review of Particle Physics

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