Measurement of ℬ(B → Χ_sγ), the B → Χ_sγ Photon Energy Spectrum, and the Direct CP Asymmetry in B → Χ_{s+d}γ Decays.
| dc.contributor.ORCID | 0000-0003-0867-2189 (Lou, X) | en_US |
| dc.contributor.VIAF | 250674117 (Izen, JM) | en_US |
| dc.contributor.VIAF | 250674117 (Izen, JM) | |
| dc.contributor.author | Lees, J. P. | en_US |
| dc.contributor.author | Poireau, V. | en_US |
| dc.contributor.author | Tisserand, V. | en_US |
| dc.contributor.author | Garra Tico, J. | en_US |
| dc.contributor.author | Grauges, E. | en_US |
| dc.contributor.author | Palano, A. | en_US |
| dc.contributor.author | Eigen, G. | en_US |
| dc.contributor.author | Izen, Joseph M. | en_US |
| dc.contributor.author | Lou, Xinchou | en_US |
| dc.contributor.author | BaBar Collaboration | en_US |
| dc.contributor.utdAuthor | Lou, Xinchou | en_US |
| dc.contributor.utdAuthor | Izen, Joseph M. | en_US |
| dc.date.accessioned | 2014-03-19T19:17:19Z | |
| dc.date.available | 2014-03-19T19:17:19Z | |
| dc.date.created | 2012-12-28 | en_US |
| dc.date.issued | 2012-12-28 | en_US |
| 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 (382.8 ± 4.2) x 10⁶ e⁺e⁻ → Υ(4S) → BB̅ events collected by the BABAR experiment at the PEP-II collider. The spectrum is used to measure the branching fraction ℬ(B → X{s}γ) = (3. 21 ± 0.15 ± 0.29 ± 0.08) x 10⁻⁴ and the first, second, and third moments E{γ} = 2.267 ± 0. 019 ± 0.032 ± 0.003 GeV, <(E{γ}) -- <E{γ}}>)² = 0.0484 ± 0.0053 ± 0.0077 ± 0.0005 GeV², and <(E{γ}) -- <E{γ}}>)³ = -0.0048 ± 0.0011 ± 0.0011± 0.0004 GeV3, for the range E{γ} > 1.8 GeV, where E{γ} is the photon energy in the B-meson rest frame. Results are also presented for narrower E{γ} ranges. In addition, the direct CP asymmetry A{CP}(B → X{s+d}γ) is measured to be 0.057 ± 0.063. The spectrum itself is also unfolded to the B-meson rest frame; that is the frame in which theoretical predictions for its shape are made. | en_US |
| dc.identifier.bibliographicCitation | Lees, J. P., V. Poireau, V. Tisserand, et al., 2012. "Measurement of ℬ(B → Χ_sγ), the B → Χ_sγ photon energy spectrum, and the direct CP asymmetry in B → Χ_{s+d}γ decays." Physical Review D 86(11), doi:10.1103/PhysRevD.86.112008 | en_US |
| dc.identifier.issn | 1550-7998 | en_US |
| dc.identifier.issue | 11 | en_US |
| dc.identifier.uri | http://hdl.handle.net/10735.1/3172 | |
| dc.identifier.volume | 86 | en_US |
| dc.language.iso | en_US | en_US |
| dc.publisher | American Physical Society | en_US |
| dc.relation.uri | http://dx.doi.org/10.1103/PhysRevD.86.112008 | |
| dc.rights | ©2012 American Physical Society | en_US |
| dc.source | Physical Review D - Particles, Fields, Gravitation and Cosmology | |
| dc.subject | Standard model (Nuclear physics) | en_US |
| dc.subject | Quantum chromodynamics | en_US |
| dc.subject | Supersymmetry | en_US |
| dc.title | Measurement of ℬ(B → Χ_sγ), the B → Χ_sγ Photon Energy Spectrum, and the Direct CP Asymmetry in B → Χ_{s+d}γ Decays. | en_US |
| dc.type | Text | en_US |
| dc.type.genre | Article | en_US |
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