Study of Exclusive Charmless Semileptonic B Decays and |Vub|
Abstract
We study semileptonic B decay to the exclusive charmless states π, ρ/ω, η, and η' using the 16fb-1 CLEO Υ(4S) data sample. We find B(B0→π-ℓ+ν)=(1.37±0.15stat±0.11sys)×10-4 and B(B0→ρ-ℓ+ν)=(2.93±0.37stat±0.37sys)×10-4 and find evidence for B+→η'ℓ+ν, with B(B+→η'ℓ+ν)=(2.66±0.80stat±0.56sys)×10-4. From our B→πℓν rate for q2>16GeV2 and lattice QCD, we find |Vub|=(3.6±0.4stat±0.2syst-0.4thy+0.6)×10-3.
- Publication:
-
Physical Review Letters
- Pub Date:
- July 2007
- DOI:
- 10.1103/PhysRevLett.99.041802
- arXiv:
- arXiv:hep-ex/0703041
- Bibcode:
- 2007PhRvL..99d1802A
- Keywords:
-
- 12.15.Hh;
- 13.20.He;
- Determination of Kobayashi-Maskawa matrix elements;
- Decays of bottom mesons;
- High Energy Physics - Experiment
- E-Print:
- 9 pages, 2 figures