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

Author:
Coito, Susana  Rupp, George  van Beveren, Eef  


Journal:
EUROPEAN PHYSICAL JOURNAL C


Issue Date:
2011


Abstract(summary):

The nature of the X(3872) enhancement is analyzed 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-ZweigIizuka-forbidden rho(0)J/psi and omega J/psi channels are coupled as well, but effectively smeared out by using complex rho(0) and omega 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), rho(0)J/psi, and omega J/psi channels is observed. The data clearly suggest that the X( 3872) is a very narrow axial-vector c (c) over bar resonance, with a pole at or slightly below the D(0)D*(0) threshold.


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