Measurement of B (B→Xsγ), the B→Xsγ photon energy spectrum, and the direct CP asymmetry in B→Xs+dγ decays
The photon spectrum in B→Xsγ decay, where Xs is any strange hadronic state, is studied using a data sample of (382.8±4.2)×106 e+e−→Υ(4S)→B¯¯¯B events collected by the BABAR experiment at the PEP-II collider. The spectrum is used to measure the branching fraction B(B→Xsγ)=(3.21±0.15±0.29±0.08)×10−4 a...
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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
28 December 2012
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| In: |
Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2012, Jahrgang: 86, Heft: 11 |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.86.112008 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevD.86.112008 Verlag, Volltext: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.86.112008 
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| Verfasserangaben: | J.P. Lees, A. Adametz, U. Uwer [und weitere] (BABAR Collaboration) |
MARC
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| 245 | 1 | 0 | |a Measurement of B (B→Xsγ), the B→Xsγ photon energy spectrum, and the direct CP asymmetry in B→Xs+dγ decays |c J.P. Lees, A. Adametz, U. Uwer [und weitere] (BABAR Collaboration) |
| 246 | 3 | 3 | |a Measurement of B (B → X s gamma), the B → X s gamma photon energy spectrum, and the direct C P asymmetry in B → X s + d gamma decays |
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| 500 | |a Im Titel sind das s und γ und die Formel s+dγ tiefgestellt | ||
| 500 | |a Im Titel ist das B vor der Klammer in anderer Schriftart dargestellt | ||
| 500 | |a Gesehen am 25.05.2018 | ||
| 520 | |a The photon spectrum in B→Xsγ decay, where Xs is any strange hadronic state, is studied using a data sample of (382.8±4.2)×106 e+e−→Υ(4S)→B¯¯¯B events collected by the BABAR experiment at the PEP-II collider. The spectrum is used to measure the branching fraction B(B→Xsγ)=(3.21±0.15±0.29±0.08)×10−4 and the first, second, and third moments ⟨Eγ⟩=2.267±0.019±0.032±0.003 GeV, ⟨(Eγ−⟨Eγ⟩)2⟩=0.0484±0.0053±0.0077±0.0005 GeV2, and ⟨(Eγ−⟨Eγ⟩)3⟩=−0.0048±0.0011±0.0011±0.0004 GeV3, for the range Eγ>1.8 GeV, where Eγ is the photon energy in the B-meson rest frame. Results are also presented for narrower Eγ ranges. In addition, the direct CP asymmetry ACP(B→Xs+dγ) 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. | ||
| 700 | 1 | |a Lees, Jean-Pierre |e VerfasserIn |0 (DE-588)1158697910 |0 (DE-627)1020777648 |0 (DE-576)504317520 |4 aut | |
| 700 | 1 | |a Adametz, Aleksandra |e VerfasserIn |0 (DE-588)1014430879 |0 (DE-627)705232115 |0 (DE-576)348804202 |4 aut | |
| 700 | 1 | |a Uwer, Ulrich |d 1965- |e VerfasserIn |0 (DE-588)172865387 |0 (DE-627)697794369 |0 (DE-576)133720837 |4 aut | |
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