Systematics of qq¯ states, scalar mesons and glueball
Abstract
Basing on the latest results of the PNPI (Gatchina) and QM&W College (London) groups, I discuss systematics of the IJPC qq¯ states in terms of trajectories on the (n,M2) plane, where n is the radial quantum number and M is its mass. In the scalar sector, which is the most interesting because of the presence of extra states with respect to the qq¯ systematics, I discuss: 1) the results of the K-matrix analysis of the spectra ππ, ππππ, KK¯, ηη, ηη', πη and characteristics of the resonances in the scalar sector, 2) qq¯-nonet classification of scalar bare states, 3) accumulation of widths of the qq¯ states by the glueball due to the overlapping of f0-resonances at 1200-1700 MeV, 4) systematics of scalar qq¯ states, both bare states and resonances, on the (n,M2)-plots, 5) constraints on the quark-gluonium content of the resonances f0(980), f0(1300), f0(1500), f0(1750), and the broad state f0(1420-70+150) from hadronic decays, 6) radiative decays of the P-wave qq¯-resonances: scalars f0(980), a0(980), and tensor mesons a2(1320), f2(1270), f2(1525). The analysis proves that in the scalar sector we face two exotic mesons: the light σ-meson, f0(450), and the broad state f0(1420-70+150), which is the descendant of the glueball.
- Publication:
-
Hadron Spectroscopy
- Pub Date:
- June 2002
- DOI:
- 10.1063/1.1482449
- arXiv:
- arXiv:hep-ph/0110326
- Bibcode:
- 2002AIPC..619..197A
- Keywords:
-
- meson resonances;
- sparticles;
- pion-pion interactions;
- kaon-kaon interactions;
- f mesons;
- quark-gluon interactions;
- meson hadronic decay;
- electromagnetic decays;
- a mesons;
- eta mesons;
- Elementary Particle Interactions;
- Eta-Mesons;
- Gluons;
- Kaons;
- Meson Resonance;
- Mesons;
- Particle Decay;
- Pions;
- Quantum Numbers;
- Quark Models;
- Quarks;
- 14.40.-n;
- 12.39.Mk;
- 13.25.Jx;
- Physics of Elementary Particles and Fields;
- Mesons;
- Glueball and nonstandard multi-quark/gluon states;
- Decays of other mesons;
- High Energy Physics - Phenomenology
- E-Print:
- 12 pages, Latex, epsfig.sty, 6 figures, Talk given on "HADRON 2001"