Acta Physica Polonica B

Vol. 35, No. 12, December 2004, page 2963


New Resonances at Belle

J. Brodzicka

I summarise Belle results on new discoveries in meson spectroscopy. Two broad D** mesons that are P-wave excitations of the c \bar {u} system as well as two narrow D{s}J states interpreted as orbitally excited P-wave c\bar {s} states have been observed. Moreover, the X(3872) charmonium-like state has been discovered. Mass of this state being very near MD + MD\star mass threshold could indicate molecular nature of newly observed state.

PACS numbers: 14.40.Gx, 12.39.Mk, 13.20.He


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