Radiative decay of the X(3872) as a mixed molecule-charmonium state in QCD Sum Rules

Details Radiative decay of the X(3872) as a mixed molecule-charmonium state in QCD Sum Rules Radiative decay of the X(3872) as a mixed molecule-charmonium state in QCD Sum Rules

2010-06-02

arxiv.org/abs/1006.0467v3

Phys.Rev.D82:116002,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 9 figures; revised version accepted for publication in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.82.116002

We use QCD sum rules to calculate the width of the radiative decay of the meson X(3872), assumed to be a mixture between charmonium and exotic molecular $[c\bar{q}][q\bar{c}]$ states with $J^{PC}=1^{++}$. We find that in a small range for the values of the mixing angle, $5^0\leq\theta\leq13^0$, we get the branching ratio $\Gamma(X\to J/\psi\gamma)/\Gamma(X\to J/\psi\pi^+\pi^-)=0.19\pm0.13$, which is in agreement, with the experimental value. This result is compatible with the analysis of the mass and decay width of the mode $J/\psi(n\pi)$ performed in the same approach.

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