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arxiv: 1006.0211 · v3 · submitted 2010-06-01 · ✦ hep-ph · hep-ex

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Dynamical origin and the pole structure of X(3872)

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classification ✦ hep-ph hep-ex
keywords analysisappliedchannelcouplingdynamicalpoleagreementallows
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The dynamical mechanism of channel coupling with the decay channels is applied to the case of coupled charmonium - $DD^*$ states with $J^{PC}=1^{++}$. A pole analysis is done and the $DD^*$ production cross section is calculated in qualitative agreement with experiment. The sharp peak at the $D_0D^*_0$ threshold and flat background are shown to be due to Breit-Wigner resonance, shifted by channel coupling from the original position of 3954 MeV for the $2^3P_1$, $Q\bar Q$ state. A similar analysis, applied to the $n=2$, $^3P_2$, $^1P_1$, $^3P_0$, allows us to associate the first one with the observed $Z(3930)$ J=2 and explains the destiny of $^3P_0$.

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  1. Proposed mixing between $2P$ and $1F$ wave charmonia

    hep-ph 2026-04 unverdicted novelty 5.0

    Unquenched calculation finds sizable 2P-1F mixing in charmonium with angles 7.5° and 15.4°, yielding predictions for two-photon and two-gluon decay widths.