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 q (q) over bar 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.
New look at scalar mesons / Maiani, Luciano; F., Piccinini; Polosa, ANTONIO DAVIDE; V., Riquer. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 93:21(2004), pp. 212002-212006. [10.1103/physrevlett.93.212002]
New look at scalar mesons
MAIANI, Luciano;POLOSA, ANTONIO DAVIDE;
2004
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 q (q) over bar 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
