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Study of B ->pi l nu and B ->rho l nu decays and determination of vertical bar V-ub vertical bar
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BaBar Collaboration (Including: UNSPECIFIED). (2005) Study of B ->pi l nu and B ->rho l nu decays and determination of vertical bar V-ub vertical bar. PHYSICAL REVIEW D, 72 (5). -. ISSN 1550-7998
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Official URL: http://dx.doi.org/10.1103/PhysRevD.72.051102
Abstract
We present an analysis of exclusive charmless semileptonic B-meson decays based on 83x10(6) B (B) over bar pairs recorded with the BABAR detector at the Upsilon(4S) resonance. Using isospin symmetry, we measure branching fractions B(B-0->pi(-)l(+)nu)=(1.38 +/- 0.10 +/- 0.16 +/- 0.08)x10(-4) and B(B-0->rho(-)l(+)nu)=(2.14 +/- 0.21 +/- 0.48 +/- 0.28)x10(-4), where the errors are statistical, experimental systematic, and due to form-factor shape uncertainties. We compare the measured distribution in q(2), the momentum-transfer squared, with theoretical predictions for the form factors from lattice QCD and light-cone sum rules, and extract the Cabibbo-Kobayashi-Maskawa (CKM) matrix element \V-ub\=(3.82 +/- 0.14 +/- 0.22 +/- 0.11(-0.52)(+0.88))x10(-3) from B ->pi l nu, where the fourth error reflects the uncertainty of the form-factor normalization.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
| Journal or Publication Title: | PHYSICAL REVIEW D |
| Publisher: | AMERICAN PHYSICAL SOC |
| ISSN: | 1550-7998 |
| Date: | September 2005 |
| Volume: | 72 |
| Number: | 5 |
| Number of Pages: | 8 |
| Page Range: | - |
| Identification Number: | 10.1103/PhysRevD.72.051102 |
| Publication Status: | Published |
| URI: | http://wrap.warwick.ac.uk/id/eprint/34525 |
Data sourced from Thomson Reuters' Web of Knowledge
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