Hyperfine Splitting and Leptonic Decay Rates in Heavy Quarkonia

2003/04/30 by Д. Эберт, D. Ebert, Р. Н. Фаустов +2 · 1 citation
Physics and Astronomy · #Atomic physics #Hadron #High-Energy Particle Collisions Research #Hyperfine structure #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quarkonium #Radiative transfer #hep-ph

paper · pdf · doi:10.1142/s0217732303011307

published as Mod.Phys.Lett. A18 (2003) 1597-1600 · 4 pages, misprint in Table 2 corrected

arxiv created 2003/06/04 · openalex publication_date 2003/07/30 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The hyperfine splitting in heavy quarkonia is considered in its relation to the leptonic decay rates with the account of relativistic and radiative corrections. The calculated decay rates agree well with the available experimental data, while the predicted η c (2S) mass is significantly smaller than the value measured recently by the Belle collaboration.

Citations

• Observation of Doublecc¯Production ine+e−Annihilation ats≈10.6 GeV
• Observation of theηc(2S)in ExclusiveB→KKSK−π+Decays
• Review of particle properties

Cited by

• Masses of the ηc(nS) and ηb(nS) mesons