Suppressed decay into open charm for the Y(4260) being an hybrid

Kou, E.;Pene, O.
(2005) arXiv —

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  • Kou, E.UCLouvain
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  • Pene, O.
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Abstract
(en) We investigate the Y(4260) resonance recently discovered by the Babar collaboration. We propose the observation of its decay into J/psi pi pi and its non observation into open charm as a consequence of it being a charmonium hybrid state with a magnetic constituent gluon. We prove a selection rule forbidding its decay into two S-wave charmed mesons in any potential model. We suggest a generalisation of the selection rule based only on the heavy quark nature of the charm. Comment: 5 pages
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Kou, E., & Pene, O. (2005). Suppressed decay into open charm for the Y(4260) being an hybrid. arXiv. https://hdl.handle.net/2078.5/257499