NEW RESONANCES AND SPECTROSCOPY AT BELLE

摘要

The Belle experiment at the KEKB asymmetric e~+ e~–collider has proven to be anexcellent experimental environment for a wide variety of measurements. These in-clude observations of several previously undiscovered particles and measurements oftheir properties. While some of these states are predicted in different models, otherpose questions regarding their nature and represent a challenge for the descrip-tion in terms of QCD. A short overview of experimental knowledge on X(3872),Z(3930), Y(3940) and X(3940) is presented.