718 articles – 7285 Notices  [english version]
 HAL : in2p3-00084757, version 1
 arXiv : hep-ph/0111329
 Chiral fluctuations in hadronic matter international workshop, Orsay : France (2001)
 Virtual quarks, vacuum stability and scalar meson physics
 (2001)
 Results are reviewed, which provide relations between the response (and eventual instability) of the chiral QCD vacuum to an increase of the number of massless quarks in the theory and the observed violations of the large $N_c$ expansion in the scalar meson sector, by combining chiral perturbation theory expansions in $m_s$ with sum rule methods. An approach based on the construction of scalar form-factors was recently confirmed by an independent approach which uses the $\pi K$ scattering amplitudes.
 Thème(s) : Physique/Physique des Hautes Energies - Phénoménologie
 Lien vers le texte intégral : http://fr.arXiv.org/abs/hep-ph/0111329
 in2p3-00084757, version 1 http://hal.in2p3.fr/in2p3-00084757 oai:hal.in2p3.fr:in2p3-00084757 Contributeur : Sylvie Florès <> Soumis le : Lundi 10 Juillet 2006, 15:07:51 Dernière modification le : Mercredi 6 Septembre 2006, 14:47:34