6533b855fe1ef96bd12b08e7
RESEARCH PRODUCT
Meson-meson interactions in a nonperturbative chiral approach
José R. PeláezJosé Antonio OllerEulogi Osetsubject
PhysicsNuclear and High Energy PhysicsParticle physicsFísica-Modelos matemáticosNuclear TheoryUnitarityMesonHigh Energy Physics::LatticePartial wave analysisHigh Energy Physics::PhenomenologyFísicaFOS: Physical sciencesNuclear Theory (nucl-th)RenormalizationHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)BibliographyFísica matemáticaHigh Energy Physics::ExperimentPi interactionChiral symmetry breakingComplex planedescription
A non-perturbative method which combines constraints from chiral symmetry breaking and coupled channel unitarity is used to describe the meson-meson interaction up to about 1.2 GeV. The approach uses the O(p^2) and O(p^4) chiral Lagrangians. The seven free parameters of the O(p^4) Lagrangian are fitted to the data. The results are in good agreement with a vast amount of experimental analyses. The amplitudes develop poles in the complex plane corresponding to the f0, a0, rho, K*, phi, sigma and kappa resonances; the latter two, very broad. The total and partial decay widths of the resonances are also well reproduced. Further extensions and applications of this chiral non-perturbative scheme are also discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1999-01-01 |