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Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.; Tico, J. Garra; Grauges, E.; Lopez, L.; Palano, A.; Pappagallo, M.; Universita di Bari, I-70126 Bari; Eigen, G.; Stugu, B.; Sun, L.; Kerth, L. T.; Abrams, G. S.; Battaglia, M.; Brown, D. N.
Physical review letters, 12/2008, Letnik: 101, Številka: 26Journal Article
We report a measurement of the branching fractions of B{yields}D**l{sup -}{nu}{sub l} decays based on 417 fb{sup -1} of data collected at the {upsilon}(4S) resonance with the BABAR detector at the PEP-II e{sup +}e{sup -} storage rings. Events are selected by fully reconstructing one of the B mesons in a hadronic decay mode. A fit to the invariant mass differences m(D{sup (*)}{pi})-m(D{sup (*)}) is performed to extract the signal yields of the different D** states. We observe the B{yields}D**l{sup -}{nu}{sub l} decay modes corresponding to the four D** states predicted by heavy quark symmetry with a significance greater than 5 standard deviations including systematic uncertainties.
