Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-07-10
Phys.Lett.B631:164-169,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages
Scientific paper
10.1016/j.physletb.2005.09.013
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.
Kou Emi
Pene Olivier
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