New States and Charmonium Spectroscopy at BaBar
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文摘
Several charmonium-like states above threshold have been discovered at the Belle and BaBar B-factories. Some are produced via Initial State Radiation (e.g. Y(4260) and Y(4350)), and some are observed in B meson decays (e.g. X(3872), Y(3940), and Z(4430)−). The Z(4430)− state has generated a great deal of interest, having minimum quark content and, thus, representing the unequivocal manifestation of a four-quark meson state. Here we summarize recent BaBar results on the Y(4260), X(3872), Y(3940), and on a search for the Z(4430)−.
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