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Search for the decay B0→a1±ρ∓

Abstract

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.

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