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http://hdl.handle.net/2445/131517
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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 | 2019-04-05T10:18:35Z | - |
dc.date.available | 2019-04-05T10:18:35Z | - |
dc.date.issued | 2008-12-11 | - |
dc.identifier.issn | 1550-7998 | - |
dc.identifier.uri | http://hdl.handle.net/2445/131517 | - |
dc.description.abstract | We present a study of hadronic transitions between Υ ( m S ) ( m = 4 , 3, 2) and Υ ( n S ) ( n = 2 , 1) resonances based on 347.5 fb − 1 of data taken with the BABAR detector at the PEP-II storage rings. We report the first observation of Υ ( 4 S ) → η Υ ( 1 S ) decay with a branching fraction B ( Υ ( 4 S ) → η Υ ( 1 S ) ) = ( 1.96 ± 0.06 stat ± 0.09 syst ) × 10 − 4 and measure the ratio of partial widths Γ ( Υ ( 4 S ) → η Υ ( 1 S ) ) / Γ ( Υ ( 4 S ) → π + π − Υ ( 1 S ) ) = 2.41 ± 0.40 stat ± 0.12 syst . We set 90% CL upper limits on the ratios Γ ( Υ ( 2 S ) → η Υ ( 1 S ) ) / Γ ( Υ ( 2 S ) → π + π − Υ ( 1 S ) ) < 5.2 × 10 − 3 and Γ ( Υ ( 3 S ) → η Υ ( 1 S ) ) / Γ ( Υ ( 3 S ) → π + π − Υ ( 1 S ) ) < 1.9 × 10 − 2 . We also present new measurements of the ratios Γ ( Υ ( 4 S ) → π + π − Υ ( 2 S ) ) / Γ ( Υ ( 4 S ) → π + π − Υ ( 1 S ) ) = 1.16 ± 0.16 stat ± 0.14 syst and Γ ( Υ ( 3 S ) → π + π − Υ ( 2 S ) ) / Γ ( Υ ( 3 S ) → π + π − Υ ( 1 S ) ) = 0.577 ± 0.026 stat ± 0.060 syst . | - |
dc.format.extent | 11 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.78.112002 | - |
dc.relation.ispartof | Physical Review D, 2008, vol. 78, p. 112002 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevD.78.112002 | - |
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 | Study of hadronic transitions between Υ states and observation of Υ(4S)→ηΥ(1S) decay | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 577672 | - |
dc.date.updated | 2019-04-05T10:18:35Z | - |
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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577672.pdf | 4.33 MB | Adobe PDF | View/Open |
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