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arXiv · 0712.1758

Hidden charm dynamically generated resonances and the $e^+e^-\to J/ψD \bar D$, $J/ψD\bar D^*$ reactions

D. Gamermann·E. Oset
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Abstract

We analyze two recent reactions of Belle, producing $D\bar D$ and $D\bar D^*$ states that have an enhancement of the invariant $D\bar D$, $D\bar D^*$ mass distribution close to threshold, from the point of view that they might be indicative of the existence of a hidden charm scalar and an axial vector meson states below $D\bar D$ or $D\bar D^*$ thresholds, respectively. We conclude that the data is compatible with the existing prediction of a hidden charm scalar meson with mass around 3700 MeV, though other possibilities cannot be discarded. The peak seen in the $D\bar D^*$ spectrum above threshold is, however, unlikely to be due to a threshold enhancement produced by the presence, below threshold, of the hidden charm axial vector meson X(3872).

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D. Gamermann, E. Oset. 2007-12-11. Hidden charm dynamically generated resonances and the $e^+e^-\to J/ψD \bar D$, $J/ψD\bar D^*$ reactions. https://doi.org/10.1140/epja%2Fi2007-10580-5

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