Isospin breaking decays as a diagnosis of the hadronic molecular structure of the Pc(4457)
The LHCb Collaboration announced the observation of three narrow structures consistent with hidden-charm pentaquark states. They are candidates of hadronic molecules formed of a pair of a charmed baryon and an anticharmed meson. Among them, the Pc(4457) mass is consistent with earlier predictions of...
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| Veröffentlicht in: | Physical review. D 2019-05, Vol.99 (9), p.091501 |
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| container_issue | 9 |
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| container_title | Physical review. D |
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| creator | Guo, Feng-Kun Jing, Hao-Jie Meißner, Ulf-G Sakai, Shuntaro |
| description | The LHCb Collaboration announced the observation of three narrow structures consistent with hidden-charm pentaquark states. They are candidates of hadronic molecules formed of a pair of a charmed baryon and an anticharmed meson. Among them, the Pc(4457) mass is consistent with earlier predictions of a ΣcD¯* molecule with I = 1/2. We point out that if such a picture were true, one would have B(Pc(4457) → J/ψΔ+)/B(Pc(4457) → J/ψp) at the level ranging from a few percent to about 30%. Such a large isospin breaking decay ratio is two to three orders of magnitude larger than that for normal hadron resonances. It is a unique feature of the ΣcD¯* molecular model, and can be checked by LHCb. |
| doi_str_mv | 10.1103/PhysRevD.99.091501 |
| format | Article |
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They are candidates of hadronic molecules formed of a pair of a charmed baryon and an anticharmed meson. Among them, the Pc(4457) mass is consistent with earlier predictions of a ΣcD¯* molecule with I = 1/2. We point out that if such a picture were true, one would have B(Pc(4457) → J/ψΔ+)/B(Pc(4457) → J/ψp) at the level ranging from a few percent to about 30%. Such a large isospin breaking decay ratio is two to three orders of magnitude larger than that for normal hadron resonances. It is a unique feature of the ΣcD¯* molecular model, and can be checked by LHCb.</description><identifier>ISSN: 2470-0010</identifier><identifier>EISSN: 2470-0029</identifier><identifier>DOI: 10.1103/PhysRevD.99.091501</identifier><language>eng</language><publisher>College Park: American Physical Society</publisher><subject>Breaking ; Charm (particle physics) ; Molecular structure</subject><ispartof>Physical review. 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| subjects | Breaking Charm (particle physics) Molecular structure |
| title | Isospin breaking decays as a diagnosis of the hadronic molecular structure of the Pc(4457) |
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