RARE Φ DECAYS AND EXOTIC HADRONS

Rare Φ Decays and Exotic Hadrons

Exotic hadrons re those whose structure differs from the usual q1q2 structure for mesons and q1q2q3 for baryons. Their exotic nature could reveal itself in unusual properties, for example, suppressed or enhanced decays, too wide or too narrow decay widths, or quantum numbers forbidden in the conventional structure. Up to now, among the huge variety of hadrons, about 10 candidates were found whi...

x / 99 10 05 8 v 1 2 7 O ct 1 99 9 Rare Φ Decays and Exotic Hadrons

New Heavy Exotic Hadrons

We review recent studies on exotic states at the Belle experiment. The results include: (1) The measurement of the cross sections of γγ → ωφ , φφ , and ωω for masses that range from threshold to 4.0 GeV. In addition to signals from well established spin-zero and spin-two charmonium states, there are clear resonant structures below charmonium threshold, which have not been previously observed. W...

Exotic Hadrons in Constituent Models

Thèse présentée pour l'obtention du grade légal de Docteur en Sciences Directeur de thèse : D r Claude Semay Membres du jury : Remerciements Bientôt 4 ans depuis mon arrivéè a l'université de Mons-Hainaut, la thèse se termine et une page se tourne. L'entrée dans l'univers de la recherche n'est pas une tâche aisée et cette aventure, loin d'ˆ etre terminée (je l'espère !), n'aurait pas commencé s...

Radiative φ decays.

Radiative φ decays give us an excellent opportunity to study scalar and pseudoscalar mesons below 1 GeV. In this paper, results from different experiments are reviewed and compared.