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arXiv · 1410.6712

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

Feng-Kun Guo·C. Hanhart·Yu. S. Kalashnikova·Ulf. -G. Meißner·A. V. Nefediev
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Abstract

Starting from the hypothesis that the X(3872) is a $D\bar D^*$ molecule, we discuss the radiative decays of the X(3872) into $γJ/ψ$ and $γψ'$ 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 $D\bar D^*$ hadronic molecular component.

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Feng-Kun Guo, C. Hanhart, Yu. S. Kalashnikova, Ulf. -G. Meißner, A. V. Nefediev. 2015-02-11. What can radiative decays of the X(3872) teach us about its nature?. https://doi.org/10.1016/j.physletb.2015.02.013

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