title: New look at scalar mesons.
abstract: Light scalar mesons are found to fit rather well a diquark-antidiquark description. The resulting nonet obeys mass formulas which respect, to a good extent, the Okubo-Zweig-Iizuka (OZI) rule. OZI allowed strong decays are reasonably reproduced by a single amplitude describing the switch of a qq pair, which transforms the state into two colorless pseudoscalar mesons. Predicted heavy states with one or more quarks replaced by charm or beauty are briefly described; they should give rise to narrow states with exotic quantum numbers.
authors.affiliation: Università di Roma La Sapienza, INFN, Rome, Italy. luciano.maiani@roma1.infn.it
authors.forename: L
authors.initials: L
authors.lastname: Maiani
authors.forename: F
authors.initials: F
authors.lastname: Piccinini
authors.forename: A D
authors.initials: AD
authors.lastname: Polosa
authors.forename: V
authors.initials: V
authors.lastname: Riquer