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Since 2003 several states in the charmonium mass region were discovered.While in the conventional c c-bar spectrum some states are missing, the numberof states observed up to now is larger than empty spaces in the c c-barspectrum. This, together with other difficulties to explain observed states asa c c-bar mesons triggered discussions on a possible exotic interpretations. Inthis proceedings we present current experimental status from B-factories of theso called X, Y and Z states.

Charmonium Spectroscopy (X,Y,Z) at the B Factories