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http://hdl.handle.net/2445/131724
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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 | 2019-04-08T09:14:48Z | - |
dc.date.available | 2019-04-08T09:14:48Z | - |
dc.date.issued | 2010-03-26 | - |
dc.identifier.issn | 1550-7998 | - |
dc.identifier.uri | http://hdl.handle.net/2445/131724 | - |
dc.description.abstract | We report measurements of the branching fractions of neutral and charged B meson decays to final states containing a K 1 ( 1270 ) or K 1 ( 1400 ) meson and a charged pion. The data, collected with the BABAR detector at the SLAC National Accelerator Laboratory, correspond to 454 × 10 6 B ¯¯¯ B pairs produced in e + e − annihilation. We measure the branching fractions B ( B 0 → K 1 ( 1270 ) + π − + K 1 ( 1400 ) + π − ) = 3.1 + 0.8 − 0.7 × 10 − 5 and B ( B + → K 1 ( 1270 ) 0 π + + K 1 ( 1400 ) 0 π + ) = 2.9 + 2.9 − 1.7 × 10 − 5 ( < 8.2 × 10 − 5 at 90% confidence level), where the errors are statistical and systematic combined. The B 0 decay mode is observed with a significance of 7.5 σ , while a significance of 3.2 σ is obtained for the B + decay mode. Based on these results, we estimate the weak phase α = ( 79 ± 7 ± 11 ) ° from the time-dependent C P asymmetries in B 0 → a 1 ( 1260 ) ± π ∓ decays. | - |
dc.format.extent | 16 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.81.052009 | - |
dc.relation.ispartof | Physical Review D, 2010, vol. 81, num. 5, p. 052009 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevD.81.052009 | - |
dc.rights | (c) American Physical Society, 2010 | - |
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 | Measurement of branching fractions of B decays to K1(1270)π and K1(1400)π and determination of the CKM angle α from B0→a1(1260)±π∓ | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 601933 | - |
dc.date.updated | 2019-04-08T09:14:48Z | - |
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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601933.pdf | 559.66 kB | Adobe PDF | View/Open |
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