Coupled-channel model for charmonium levels and an option for X(3872)
Abstract
The effects of charmed meson loops on the spectrum of charmonium are considered, with special attention paid to the levels above open-charm threshold. It is found that the coupling to charmed mesons generates a structure at the D D* threshold in the 1++ partial wave. The implications for the nature of the X(3872) state are discussed.
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