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http://hdl.handle.net/2445/131515
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DC Field | Value | Language |
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dc.contributor.author | Garra Ticó, Jordi | - |
dc.contributor.author | Graugés Pous, Eugeni | - |
dc.contributor.author | BABAR Collaboration | - |
dc.date.accessioned | 2019-04-05T10:14:32Z | - |
dc.date.available | 2019-04-05T10:14:32Z | - |
dc.date.issued | 2008-12-29 | - |
dc.identifier.issn | 1550-7998 | - |
dc.identifier.uri | http://hdl.handle.net/2445/131515 | - |
dc.description.abstract | We present an investigation of the decays ¯¯¯ B 0 → Λ + c ¯ p and B − → Λ + c ¯ p π − based on 383 × 10 6 Υ ( 4 S ) → B ¯¯¯ B decays recorded with the BABAR detector. We measure the branching fractions of these decays; their ratio is B ( B − → Λ + c ¯ p π − ) / B ( ¯¯¯ B 0 → Λ + c ¯ p ) = 15.4 ± 1.8 ± 0.3 . The B − → Λ + c ¯ p π − process exhibits an enhancement at the Λ + c ¯ p threshold and is a laboratory for searches for excited charm baryon states. We observe the resonant decays B − → Σ c ( 2455 ) 0 ¯ p and B − → Σ c ( 2800 ) 0 ¯ p but see no evidence for B − → Σ c ( 2520 ) 0 ¯ p . This is the first observation of the decay B − → Σ c ( 2800 ) 0 ¯ p ; however, the mass of the observed excited Σ 0 c state is ( 2846 ± 8 ± 10 ) MeV / c 2 , which is somewhat inconsistent with previous measurements. Finally, we examine the angular distribution of the B − → Σ c ( 2455 ) 0 ¯ p decays and measure the spin of the Σ c ( 2455 ) 0 baryon to be 1 / 2 , as predicted by the quark model. | - |
dc.format.extent | 18 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | American Physical Society | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.78.112003 | - |
dc.relation.ispartof | Physical Review D, 2008, vol. 78, num. 11, p. 112003 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevD.78.112003 | - |
dc.rights | (c) American Physical Society, 2008 | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Física de partícules | - |
dc.subject.classification | Experiments | - |
dc.subject.other | Particle physics | - |
dc.subject.other | Experiments | - |
dc.title | Measurements of B(¯¯¯B0→Λ+c¯p) and B(B−→Λ+c¯pπ−) and studies of Λ+cπ− resonances | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 577668 | - |
dc.date.updated | 2019-04-05T10:14:32Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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577668.pdf | 679.06 kB | Adobe PDF | View/Open |
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