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arxiv: 0901.1553 · v2 · submitted 2009-01-12 · ✦ hep-ph

Ambiversion of X(3872)

classification ✦ hep-ph
keywords stateboundchannelcoupledpolethresholdvirtualambiversion
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An analysis including most recent Belle data on X(3872) is performed, using coupled channel Flatt\'e formula. A third sheet pole close to but \textit{below} $D^0D^{*0}$ threshold is found, besides the bound state/virtual state pole discussed in previous literature. The co-existence of two poles near the $D^0D^{*0}$ threshold indicates that the X(3872) may be of ordinary $c\bar c$ $2 ^3P_1$ state origin, distorted by strong coupled channel effects. The latter manifests itself as a molecular bound state (or a virtual state).

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