Measurement of the Direct Asymmetry in Decays with a Lepton Tag
Journal Article
·
· Physical Review Letters
We report the measurement of the direct CP asymmetry in the radiative B¯→ Xs+dγ decay using a data sample of (772 ± 11) × 106 BB¯ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e– collider. Here, the CP asymmetry is measured as a function of the photon energy threshold. For E$$^{*}_{γ}$$ ≥ 2.1 GeV, where E$$^{*}_{γ}$$ is the photon energy in the center-of-mass frame, we obtain ACP(B¯ → Xs+dγ) = (2.2 ± 3.9 ± 0.9)%, consistent with the standard model prediction.
- Research Organization:
- Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- Belle Collaboration
- Grant/Contract Number:
- SC0009973
- OSTI ID:
- 1594425
- Alternate ID(s):
- OSTI ID: 1180739
- Journal Information:
- Physical Review Letters, Vol. 114, Issue 15; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 5 works
Citation information provided by
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Web of Science
Averages of b-hadron, c-hadron, and $$\tau $$ τ -lepton properties as of summer 2016
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journal | December 2017 |
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