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arXiv · hep-ex/0512035

Observation of a chi'_(c2) candidate in gamma gamma --> D Dbar production at Belle

The Belle Collaboration·S. Uehara
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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/c^2. 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 2^3P_2 charmonium state.

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The Belle Collaboration, S. Uehara. 2006-07-07. Observation of a chi'_(c2) candidate in gamma gamma --> D Dbar production at Belle. https://doi.org/10.1103/physrevlett.96.082003

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