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http://hdl.handle.net/2445/140394
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DC Field | Value | Language |
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dc.contributor.author | Graugés Pous, Eugeni | - |
dc.contributor.author | BABAR Collaboration | - |
dc.date.accessioned | 2019-09-18T11:46:33Z | - |
dc.date.available | 2019-09-18T11:46:33Z | - |
dc.date.issued | 2006-10-24 | - |
dc.identifier.issn | 0031-9007 | - |
dc.identifier.uri | http://hdl.handle.net/2445/140394 | - |
dc.description.abstract | The photon spectrum in B → X s γ decay, where X s is any strange hadronic state, is studied using a data sample of 88.5 × 10 6 e + e − → Υ ( 4 S ) → B ¯¯¯ B decays collected by the BABAR experiment at the Stanford Linear Accelerator Center. The partial branching fraction, Δ B ( B → X s γ ) = ( 3.67 ± 0.29 ( stat ) ± 0.34 ( syst ) ± 0.29 ( model ) ) × 10 − 4 , the first moment ⟨ E γ ⟩ = 2.288 ± 0.025 ± 0.017 ± 0.015 GeV , and the second moment ⟨ E 2 γ ⟩ = 0.0328 ± 0.0040 ± 0.0023 ± 0.0036 GeV 2 are measured for the photon energy range 1.9 GeV < E γ < 2.7 GeV . They are also measured for narrower E γ ranges. The moments are then fit to recent theoretical calculations to extract the heavy quark expansion parameters m b and μ 2 π and to extrapolate the partial branching fraction to E γ > 1.6 GeV . In addition, the direct C P asymmetry A C P ( B → X s + d γ ) is measured to be − 0.110 ± 0.115 ( stat ) ± 0.017 ( syst ) . | - |
dc.format.extent | 7 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/PhysRevLett.97.171803 | - |
dc.relation.ispartof | Physical Review Letters, 2006, vol. 97, num. 17, p. 171803 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevLett.97.171803 | - |
dc.rights | (c) American Physical Society, 2006 | - |
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 the Branching Fraction and Photon Energy Moments of B→Xsγ and CP(B→Xs+dγ) | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 551663 | - |
dc.date.updated | 2019-09-18T11:46:34Z | - |
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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551663.pdf | 168.83 kB | Adobe PDF | View/Open |
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