Improved Measurement of $B^{+}\to {\rho }^{+}{\rho }^0$ and Determination of the Quark-Mixing Phase Angle $\alpha$

B. Aubert

We present improved measurements of the branching fraction $\mathcal{B}$, the longitudinal polarization fraction $f_L$, and the direct {\ensuremath{CP}\xspace} asymmetry {\ensuremath{…