Heavy quark spin selection rule and the properties of the X (3872)

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The properties of the resonance X(3872) are discussed under the assumption that this resonance is dominantly a 'molecular' JPC=1++ state of neutral D and D* mesons. It is argued that these properties should be dominated by the states with the total spin of the charmed quark-antiquark pair equal to one. As a practical application of this observation the ratio of the rates of the decays X→π0χcJ for different J is predicted. It is also pointed out that the total rate of these decays is likely to be comparable to that of the observed transitions X→π+π-Jψ and X→π+π-π0Jψ. The decays of the X into light hadrons and its production in hadronic processes are also briefly discussed.

Original languageEnglish (US)
Pages (from-to)69-73
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
StatePublished - Dec 16 2004

Bibliographical note

Funding Information:
This work is supported in part by the DOE grant DE-FG02-94ER40823.


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