ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2006, vol. 74, p. -
Search for the decay B 0→a 1 ±ρ
We present a search for the rare B-meson decay B0→a1±ρ with a1±→π +π -π ±. We use (110±1.2)×106Υ(4S)→BB̄ decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We obtain an upper limit of 30×10 -6(90%C.L.) for the branching fraction product B(B0→a1±ρ)B(a1±→π +π -π ±), where we assume that the a1± decays exclusively to ρ0π ±. © 2006 The American Physical Society.