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DC Field | Value | Language |
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dc.contributor.author | Khan, A | - |
dc.contributor.author | Aubert, B | - |
dc.contributor.author | Bona, M | - |
dc.contributor.author | Boutigny, D | - |
dc.contributor.author | Karyotakis, Y | - |
dc.coverage.spatial | 7 | en |
dc.date.accessioned | 2008-01-09T16:23:37Z | - |
dc.date.available | 2008-01-09T16:23:37Z | - |
dc.date.issued | 2007 | - |
dc.identifier.citation | Physical Review Letters, Aug 2007 | en |
dc.identifier.uri | http://bura.brunel.ac.uk/handle/2438/1536 | - |
dc.description.abstract | We present partial branching fractions for inclusive charmless semileptonic B decays Bbar --> X_u ell nubar, and the determination of the CKM matrix element |V_{ub}|. The analysis is based on a sample of 383 million Y(4S) decays into B Bbar pairs collected with the BaBar detector at the PEP-II e+ e- storage rings. We select events using either the invariant mass M_X of the hadronic system, the invariant mass squared, q^2, of the lepton and neutrino pair, the kinematic variable P_+ or one of their combinations. We then determine partial branching fractions in limited regions of phase space: Delta B = (1.18 +- 0.09_{stat.} +- 0.07_{sys.} +- 0.01_{theo.}) x 10^{-3} (M_X < 1.55 GeV/c^2), Delta B = (0.95 +- 0.10_{stat.} +- 0.08_{sys.} +- 0.01_{theo.}) x 10^{-3} (P_+ < 0.66 GeV/c), and Delta B = (0.76 +- 0.08_{stat.} +- 0.07_{sys.} +- 0.02_{theo.}) x 10^{-3} (M_X < 1.7 GeV/c^2, q^2 > 8 GeV^2/c^4). Corresponding values of |V_{ub}| are extracted using several theoretical calculations. | en |
dc.format.extent | 218200 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | American Physical Society | en |
dc.title | Measurements of Partial Branching Fractions for anti-B ---> X(u) l anti-nu and Determination of |V(ub)| | en |
dc.type | Preprint | en |
Appears in Collections: | Electronic and Electrical Engineering Dept of Electronic and Electrical Engineering Research Papers |
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File | Description | Size | Format | |
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0708.3702v1.pdf | 213.09 kB | Adobe PDF | View/Open |
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