{"arxiv_id":"hep-ph/0507119","title":"Suppressed decay into open charm for the Y(4260) being an hybrid","abstract":"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.","primary_cat":"hep-ph","cross_cats":[],"submitted_at":"2005-07-10T20:42:11+00:00","latest_version":2,"source":"arxiv","source_label":"arXiv","source_url":null,"has_pdf":true,"has_source":false,"verdict":"CONDITIONAL","confidence":"MODERATE","one_line_summary":"A symmetry-based selection rule forbids the Y(4260), if it is a charmonium hybrid with a magnetic gluon, from decaying into two S-wave charmed mesons, explaining its observed J/psi pi pi mode and its missing open-charm mode.","novelty_score":6.0,"correctness_risk":"medium","formal_verification":"none","upvotes":0,"downvotes":0,"pith_score":0.0,"inbound_count":19,"_links":{"html":"https://pith.science/paper/hep-ph/0507119","verdict":"/api/v1/verdicts/hep-ph/0507119"}}