LIGHT SCALARS AS TETRAQUARKS OR TWO-MESON STATES FROM LARGE-Nc AND UNITARIZED CHIRAL PERTURBATION THEORY

2004/11/08 by J. R. Peláez, J. R. Pelaez
Physics and Astronomy · #Chiral perturbation theory #High-Energy Particle Collisions Research #Meson #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Scalar (mathematics) #Scalar meson #Vector meson #hep-ph

paper · pdf · doi:10.1142/s0217732304016160

published as Mod.Phys.Lett.A19:2879-2894,2004 · Invited Brief Report to appear in Modern Physcis Letters A. 15 pages

arxiv created 2004/11/08 · openalex publication_date 2004/12/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

By means of unitarized Chiral Perturbation Theory it is possible to obtain a remarkable description of meson–meson scattering amplitudes up to 1.2 GeV, and generate poles associated to scalar and vector resonances. Since Chiral Perturbation Theory is the QCD low energy effective theory, it is then possible to study its large-N c limit where [Formula: see text] states are easily identified. The vectors thus generated follow closely a [Formula: see text] behavior, whereas the light scalar poles follow the large-N c behavior expected for a dominant tetraquark or two-meson structure.

Citations

• Chiral symmetry amplitudes in the S-wave isoscalar and isovector channels and the σ, f0(980), a0(980) scalar mesons
• Putative light scalar nonet
• Kl4 decays beyond one loop
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• Inverse amplitude method and chiral perturbation theory to two loops
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• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)