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

2014/10/31 by Feng-Kun Guo, C. Hanhart, Yu. S. Kalashnikova +2 · 1 citation
Physics and Astronomy · #hep-ph #hep-ex #nucl-th

paper · pdf · doi:10.1016/j.physletb.2015.02.013

published as Phys.Lett. B742 (2015) 394-398 · LaTeX2e, 10 pages, 1 figure, 2 tables, version ot appear in Phys.Lett.B

arxiv created 2015/02/11 · arxiv updated 2015/02/19

Abstract

Starting from the hypothesis that the X(3872) is a D 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 D^* hadronic molecular component.

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• Possible Bound States in the D^∗ D^∗/B^∗ B^∗ and D^∗ D^∗/ B^∗ B^∗ Systems within the Bethe-Salpeter Formalism

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