2002/08/12 by Stéphan Narison, Stephan Narison · 13 citations
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Content (measure theory) #Gluon #Mathematical analysis #Mathematics #Meson #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Scalar (mathematics) #hep-ex #hep-lat #hep-ph #nucl-th
paper · pdf · doi:10.1016/s0920-5632(03)01828-0
published in Nuclear Physics B - Proceedings Supplements 121, 131-134 (Elsevier BV) · References added. Mini-review given at the QCD 02 9th International High-Energy Physics Conference in Quantum ChromoDynamics (Montpellier 2-9th July 2002)
arxiv created 2002/08/12 · openalex publication_date 2003/06/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We summarize the different features of the scalar mesons from QCD spectral sum rule analyses of the two- and three-point functions. The results do not favour the u-bar u + d-bar d interpretation of the broad and low mass sigma (0.6), and the u-bar s resonance nature of the eventually observed kappa(0.9) meson. We also discuss some OZI-violating and classic semileptonic and radiative decay processes which can reveal in a model-independent way the eventual gluon component sigmaB of the sigma. In a meson-gluonium mixing scenario, one also expects an observation of the K K-bar final states from the sigmaB which may compete (if phase space allowed) with the one from a low mass s-bar s state assumed in the literature to be the SU(3) partner of the σ(0.6) if this latter is a u-bar u + d-bar d state