Observation of a chi'(c2) candidate in gamma gamma --> D Dbar production at Belle
Abstract
We report on a search for new resonant states in the process gamma gamma --> D Dbar. A candidate C-even charmonium state is observed in the vicinity of 3.93 GeV/c2. The production rate and the angular distribution in the gamma gamma center-of-mass frame suggest that this state is the previously unobserved chi'(c2), the 23P2 charmonium state.
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