What can radiative decays of the X(3872) teach us about its nature?
Starting from the hypothesis that the X(3872) is a DD¯⁎ 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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2015-03-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269315000763 |
| Summary: | Starting from the hypothesis that the X(3872) is a DD¯⁎ 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 DD¯⁎ hadronic molecular component. Keywords: Exotic hadrons, Charmonium |
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| ISSN: | 0370-2693 |