What can radiative decays of the X(3872) teach us about its nature?

Abstract

Starting from the hypothesis that the X(3872) is a $D{\bar{D}}^{\ast }$ molecule, we discuss the radiative decays of the X(3872) into $\gamma J/\psi$ and $\gamma {\psi }^{\prime }$ from an effective field theory point of view. We show that radiative decays are very weakly sensitive to the long-range structure of the X(3872). In particular, contrary to earlier claims, we argue that the experimentally determined ratio of the mentioned branching fractions is not in conflict with a wave function of the X(3872) that is dominated by the $D{\bar{D}}^{\ast }$ hadronic molecular component.

LaTeX2e, 10 pages, 1 figure, 2 tables, version ot appear in Phys.Lett.B

References in corpus (12)

• Big-Bang Nucleosynthesis
• Pion Interactions in the X(3872)
• Reconciling the X(3872) with the near-threshold enhancement in the D^0\bar{D}^{*0} final state
• Estimate for the X(3872) to gamma J/psi decay width
• Isospin breaking effects in the X(3872) resonance
• Effect of charmed meson loops on charmonium transitions
• X(3872) as a hadronic molecule and its decays to charmonium states and pions
• Nature of X(3872) from data
• Strong and radiative decays of the $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$
• Exotic Heavy Quarkonium Spectroscopy: A Mini-review
• Detecting the long-distance structure of the X(3872)
• Extracting the light quark mass ratio m_u/m_d from bottomonia transitions

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