Measurements of the Branching Fractions and Helicity Amplitudes in B --> D* rho Decays

Details Measurements of the Branching Fractions and Helicity Amplitudes in B --> D* rho Decays Measurements of the Branching Fractions and Helicity Amplitudes in B --> D* rho Decays

2003-01-16

arxiv.org/abs/hep-ex/0301028v1

Phys.Rev.D67:112002,2003

Physics

High Energy Physics

High Energy Physics - Experiment

11 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS, submitted to PRD

Scientific paper

10.1103/PhysRevD.67.112002

Using 9.1 fb-1 of e+ e- data collected at the Upsilon(4S) with the CLEO detector using the Cornell Electron Storage Ring, measurements are reported for both the branching fractions and the helicity amplitudes for the decays B- -> D*0 rho- and B0bar -> D*+ rho-. The fraction of longitudinal polarization in B0bar -> D*+ rho- is found to be consistent with that in B0bar -> D*+ l- nubar at q^2 = M^2_rho, indicating that the factorization approximation works well. The longitudinal polarization in the B- mode is similar. The measurements also show evidence of non-trivial final-state interaction phases for the helicity amplitudes.

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