Evidence for X(3872)→ψ(2S)γ in B±→X(3872)K± Decays and a Study of B→c¯cγK
In a search for B → c ¯ c γ K decays with the BABAR detector, where c ¯ c includes J / ψ and ψ ( 2 S ) , and K includes K ± , K 0 S , and K ∗ ( 892 ) , we find evidence for X ( 3872 ) → J / ψ γ and X ( 3872 ) → ψ ( 2 S ) γ with 3.6 σ and 3.5 σ significance, respectively. We measure the product of br...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2009 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/138321 |
| Acceso en línea: | https://hdl.handle.net/2445/138321 |
| Access Level: | acceso abierto |
| Palabra clave: | Física de partícules Experiments Particle physics |
| Sumario: | In a search for B → c ¯ c γ K decays with the BABAR detector, where c ¯ c includes J / ψ and ψ ( 2 S ) , and K includes K ± , K 0 S , and K ∗ ( 892 ) , we find evidence for X ( 3872 ) → J / ψ γ and X ( 3872 ) → ψ ( 2 S ) γ with 3.6 σ and 3.5 σ significance, respectively. We measure the product of branching fractions B ( B ± → X ( 3872 ) K ± ) × B ( X ( 3872 ) → J / ψ γ ) = [ 2.8 ± 0.8 ( stat ) ± 0.1 ( syst ) ] × 10 − 6 and B ( B ± → X ( 3872 ) K ± ) × B ( X ( 3872 ) → ψ ( 2 S ) γ ) = [ 9.5 ± 2.7 ( stat ) ± 0.6 ( syst ) ] × 10 − 6 . |
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