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 IJ^{PC} qq¯ states in terms of trajectories on the (n,M^{2}) 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 Kmatrix 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 f_{0}resonances at 12001700 MeV, 4) systematics of scalar qq¯ states, both bare states and resonances, on the (n,M^{2})plots, 5) constraints on the quarkgluonium content of the resonances f_{0}(980), f_{0}(1300), f_{0}(1500), f_{0}(1750), and the broad state f_{0}(142070+150) from hadronic decays, 6) radiative decays of the Pwave qq¯resonances: scalars f_{0}(980), a_{0}(980), and tensor mesons a_{2}(1320), f_{2}(1270), f_{2}(1525). The analysis proves that in the scalar sector we face two exotic mesons: the light σmeson, f_{0}(450), and the broad state f_{0}(142070+150), which is the descendant of the glueball.
 Publication:

Hadron Spectroscopy
 Pub Date:
 June 2002
 DOI:
 10.1063/1.1482449
 arXiv:
 arXiv:hepph/0110326
 Bibcode:
 2002AIPC..619..197A
 Keywords:

 meson resonances;
 sparticles;
 pionpion interactions;
 kaonkaon interactions;
 f mesons;
 quarkgluon interactions;
 meson hadronic decay;
 electromagnetic decays;
 a mesons;
 eta mesons;
 Elementary Particle Interactions;
 EtaMesons;
 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 multiquark/gluon states;
 Decays of other mesons;
 High Energy Physics  Phenomenology
 EPrint:
 12 pages, Latex, epsfig.sty, 6 figures, Talk given on "HADRON 2001"