Rates, Polarizations, and Asymmetries in Charmless Vector-VectorBMeson Decays

With a sample of approximately $89\times {10}^6$ $B\overline{B}$ pairs collected with the BABAR detector, we perform a search for $B$ meson decays into pairs of charmless vector mesons ($\phi$, $\rho$, and $K^{*}$). We measure the branching fractions, determine the degree of longitudinal polarization, and search for $CP$ violation asymmetries in the processes $B^{+}\to \phi K^{*+}$, $B^0\to \phi K^{*0}$, $B^{+}\to {\rho }^0{K}^{*+}$, and $B^{+}\to {\rho }^0{\rho }^{+}$. We also set an upper limit on the branching fraction for the decay $B^0\to {\rho }^0{\rho }^0$.