TY - JOUR
T1 - Observation of the decay B- D(s)((*)+) K- ℓ- nu(ℓ)
AU - del Amo Sanchez, P.
AU - Raven, H.G.
AU - Snoek, H.
AU - BaBar, Collaboration
PY - 2011
Y1 - 2011
N2 - We report the observation of the decay B- D(s)((*)+) K- ℓ- nu(ℓ) based on 342fb(-1) of data collected at the Upsilon(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- nu(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- nu(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.
AB - We report the observation of the decay B- D(s)((*)+) K- ℓ- nu(ℓ) based on 342fb(-1) of data collected at the Upsilon(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- nu(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- nu(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.
UR - https://www.scopus.com/pages/publications/79961142643
UR - https://www.scopus.com/inward/citedby.url?scp=79961142643&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.107.041804
DO - 10.1103/PhysRevLett.107.041804
M3 - Article
SN - 0031-9007
VL - 107
SP - 041804
JO - Physical Review Letters
JF - Physical Review Letters
IS - 4
M1 - 041804
ER -