Study of scalar mesons in chiral Lagrangian frameworks

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We review two approaches to studying pseudoscalar meson-meson scattering amplitudes to beyond 1 GeV using non-linear and linear chiral Lagrangians. These approaches use two different unitarisation techniques - a generalised Breit Wigner prescription and K-matrix unitarization respectively. We also report some preliminary findings on K-matrix unitarisation of the I=J=0 pion-pion scattering amplitude in the non-linear chiral Lagrangian approach and make some remarks about the light scalar mesons.
Contribution to XII Conference on Hadron Spectroscopy, Frascati 2007. 8 pages, 2 figures

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High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/146076

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0801.2472
 http://arxiv.org/abs/0801.2472

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arXiv