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http://bura.brunel.ac.uk/handle/2438/1541| Title: | Observation of the semileptonic decays B ---> D* tau- anti-nu(tau) and evidence for B ---> D tau- anti-nu(tau |
| Authors: | Khan, A Aubert, B Bona, M Boutigny, D Karyotakis, Y |
| Issue Date: | 2007 |
| Publisher: | American Physical Society |
| Citation: | Physical Review Letters, Sep 2007 |
| Abstract: | We present measurements of the semileptonic decays B- --> D0 tau- nubar, B- --> D*0 tau- nubar, B0bar --> D+ tau- nubar, and B0bar --> D*+ tau- nubar, which are potentially sensitive to non--Standard Model amplitudes. The data sample comprises 232x10^6 Upsilon(4S) --> BBbar decays collected with the BaBar detector. From a combined fit to B- and B0bar channels, we obtain the branching fractions B(B --> D tau- nubar) = (0.86 +/- 0.24 +/- 0.11 +/- 0.06)% and B(B --> D* tau- nubar) = (1.62 +/- 0.31 +/- 0.10 +/- 0.05)% (normalized for the B0bar), where the uncertainties are statistical, systematic, and normalization-mode-related. |
| URI: | http://bura.brunel.ac.uk/handle/2438/1541 |
| Appears in Collections: | Electronic and Computer Engineering Dept of Electronic and Electrical Engineering Research Papers |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 0709.1698v1.pdf | 209.7 kB | Adobe PDF | View/Open |
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