Observation of the decay B- → D(s)((*)+) K- ℓ- ν(ℓ).
| Author | |
|---|---|
| Abstract |
:
We report the observation of the decay B- → D(s)((*)+) K- ℓ- ν(ℓ) based on 342 fb(-1) of data collected at the Υ(4S) resonance with the BABAR detector at the PEP-II e+ e- storage rings at SLAC. A simultaneous fit to three D(s)(+) decay chains is performed to extract the signal yield from measurements of the squared missing mass in the B meson decay. We observe the decay B- → D(s)((*)+) K- ℓ- ν(ℓ) with a significance greater than 5 standard deviations (including systematic uncertainties) and measure its branching fraction to be B(B- → D(s)((*)+) K- ℓ- ν(ℓ)) = [6.13(-1.03)(+1.04)(stat)±0.43(syst)±0.51(B(D(s)))]×10(-4), where the last error reflects the limited knowledge of the D(s) branching fractions. |
| Year of Publication |
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2011
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| Journal |
:
Physical review letters
|
| Volume |
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107
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| Issue |
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4
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| Number of Pages |
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041804
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| Date Published |
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2011 Jul 22
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| ISSN Number |
:
0031-9007
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| URL |
:
http://link.aps.org/abstract/PRL/v107/p041804
|
| Short Title |
:
Phys Rev Lett
|
| Download citation |
