Study of B0��0�0 decays, implications for the CKM angle ?2 and search for other B0 decay modes with a four-pion final state

Abstract

We present a study of the branching fraction of the decay B to rho0 rho0 and the fraction of longitudinally polarzed rho0 mesons in this decays The results are obtained from the final data sample containing 772 million Bbar{B} pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.