Measurement of the B0→π−ℓ+ν and B+→η(')ℓ+ν branching fractions, the B0→π−ℓ+ν and B+→ηℓ+ν form-factor shapes, and determination of |Vub|
We report the results of a study of the exclusive charmless semileptonic decays, B+→η(')ℓ+ν and B0→π−ℓ+ν, undertaken with approximately 464×106 BB[bar] pairs collected at the Υ(4S) resonance with the BABAR detector. The analysis uses events in which the signal B decays are reconstructed with a...
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| Main Authors: | , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
24 March 2011
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| In: |
Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2011, Volume: 83, Issue: 5, Pages: 1-16 |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.83.052011 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.83.052011 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.83.052011 
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| Author Notes: | BABAR Collaboration* |
| Summary: | We report the results of a study of the exclusive charmless semileptonic decays, B+→η(')ℓ+ν and B0→π−ℓ+ν, undertaken with approximately 464×106 BB[bar] pairs collected at the Υ(4S) resonance with the BABAR detector. The analysis uses events in which the signal B decays are reconstructed with a loose neutrino reconstruction technique. We obtain partial branching fractions for B+→ηℓ+ν and B0→π−ℓ+ν decays in three and 12 bins of q2, respectively, from which we extract the f+(q2) form-factor shapes and the total branching fractions B(B+→ηℓ+ν)=(0.36±0.05stat±0.04syst)×10−4 and B(B0→π−ℓ+ν)=(1.42±0.05stat±0.07syst)×10−4. We also measure B(B+→η′ℓ+ν)=(0.24±0.08stat±0.03syst)×10−4. We obtain values for the magnitude of the CKM matrix element |Vub| using three different QCD calculations. |
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| Item Description: | *BABAR Collaboration: P. del Amo Sanchez, J. Marks, U. Uwer [und 432 weitere Personen] Im Titel sind die Zahl 0 und die Plus- und Minuszeichen hochgestellt Im Titel ist der Ausdruck "(')" hochgestellt Im Titel ist der Ausdruck "ub" tiefgestellt Gesehen am 05.10.2022 |
| Physical Description: | Online Resource |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.83.052011 |