Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-11-23
AIP Conf.Proc.1343:361-363,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
Talk given at the 9th Conference On Quark Confinement and the Hadron Spectrum (Confinement IX), 30 Aug. - 3 Sept. 2010, Madrid
Scientific paper
10.1063/1.3575030
Scalar-isoscalar states are analyzed within the large-Nc Regge approach. We find that the lightest f0(600) scalar-isoscalar state fits very well into the pattern of the radial Regge trajectory. We confirm the obtained mass values from an analysis of the pion and nucleon spin-0 gravitational form factors, recently measured on the lattice. We find that a simple two-state model suggests a meson nature of f0(600), and a glueball nature of f0(980), which naturally explains the ratios of various coupling constants. Finally, matching to the OPE requires a fine-tuned mass condition of the vanishing dimension-2 condensate in the Regge approach with infinitely many scalar-isoscalar states.
Arriola Enrique Ruiz
Broniowski Wojciech
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