Abstract
We report the first evidence of charmless semileptonic decays of B mesons. In the momentum interval 2.42.6 GeV/c where the background from bcl is negligible, the average of the measured ue and u partial branching ratios is Bub(2.4,2.6) =(1.80.40.3)×10-4. Inclusion of data from the interval 2.22.4 GeV/c, where the lepton yield is dominated by bcl, gives Bub(2.2,2.6) =(3.30.80.8)×10-4. Vub/Vcb depends on the theoretical model of bul decay and is approximately 0.1.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 16-20 |
| Number of pages | 5 |
| Journal | Physical review letters |
| Volume | 64 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1990 |
| Externally published | Yes |
ASJC Scopus subject areas
- General Physics and Astronomy
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