Francesco Giacosa
Published 2007-11-20, updated 2007-11-25Version 2
The tetraquark assignement for light scalar states below 1 GeV is discussed on the light of strong decays. The next-to-leading order in the large-N expansion for the strong decays is considered. Mixing with quarkonia states above 1 GeV is investigated within a chiral approach and the inclusion of finite-width effects is taken into account.
Comments: Talk given at the International School of Nuclear Physics, 29th Course, 'Quarks in Hadrons and Nuclei', Erice-Sicily, 16-24 September 2007. To appear in Prog. Part. Nucl. Phys. 10 pages, 1 figure
Journal: Prog.Part.Nucl.Phys.61:133-139,2008
Strong decays of the $XYZ$ states
The fermion-loop scheme for finite-width effects in e^+ e^- annihilation into four fermions
Finite-width effects on threshold corrections to squark and gluino production
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