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arXiv · 1008.5100

Delicate interplay between the D0-D*0, rho0-J/psi, and omega-J/psi channels in the X(3872) resonance

Susana Coito·George Rupp·Eef van Beveren
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Abstract

The nature of the X(3872) enhancement is analysed in the framework of the Resonance-Spectrum Expansion, by studying it as a regular $J^{PC}=1^{++}$ charmonium state, though strongly influenced and shifted by open-charm decay channels. The observed but Okubo-Zweig-Iizuka-forbidden $ρ^0 J/ψ$ and $ωJ/ψ$ channels are coupled as well, but effectively smeared out by using complex $ρ^0$ and $ω$ masses, in order to account for their physical widths, followed by a rigorous algebraic procedure to restore unitarity. A very delicate interplay between the $D^0 D^{*0}$, $ρ^0 J/ψ$, and $ωJ/ψ$ channels is observed. The data clearly suggest that the X(3872) is a very narrow axial-vector $c\bar{c}$ resonance, with a pole at or slightly below the $D^0D^{*0}$ threshold.

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Susana Coito, George Rupp, Eef van Beveren. 2011-09-13. Delicate interplay between the D0-D*0, rho0-J/psi, and omega-J/psi channels in the X(3872) resonance. https://doi.org/10.1140/epjc%2Fs10052-011-1762-7

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