Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2003-02-13
Phys.Rev.D67:092003,2003
Physics
High Energy Physics
High Energy Physics - Experiment
9 pages, 4 postscript figues, submitted to Physical Review D (Rapid Communications)
Scientific paper
10.1103/PhysRevD.67.092003
We present a study of the decays B0->D_s(*)+D*-, using 20.8 fb-1 of e+e- annihilation data recorded with the BABAR detector. The analysis is conducted with a partial reconstruction technique, in which only the D_s(*)+ and the soft pion from the D*- decay are reconstructed. We measure the branching fractions BR(B0->D_s+D*-) = (1.03 +/- 0.14 +/- 0.13 +/- 0.26)% and BR(B0->D_s*+D*-) = (1.97 +/- 0.15 +/- 0.30 +/- 0.49)%, where the first error is statistical, the second is systematic, and the third is the error due to the D_s+->phi pi+ branching fraction uncertainty. From the B0->D_s*+D*- angular distributions, we measure the fraction of longitudinal polarization Gamma_L/Gamma = (51.9 +/- 5.0 +/- 2.8)%, which is consistent with theoretical predictions based on factorization.
"The BABAR Collaboration
Aubert B.
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