| Abstract |
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We present a Dalitz-plot analysis of charmless B+- decays
to the final state pi+-pi+-pi-+ using a sample of (465+-5)x10^-6
BBbar pairs collected by the BABAR experiment at \sqrt{s} =
10.58 GeV. We measure the branching fractions BF(B+- --> pi+-pi+-pi-+)
= (15.2+-0.6+-1.2+-0.4)x10^-6, BF(B+- --> rho0(770)pi+-) =
(8.1+-0.7+-1.2^{+0.4}_{-1.1})x10^-6, BF(B+- --> f2(1270)pi+-) =
(1.57+-0.42+-0.16^{+0.53}_{-0.19})x10^-6, and BF(B+- --> pi+-pi+-pi-+
nonresonant) = (5.3+-0.7+-0.6^{+1.1}_{-0.5})x10^-6, where the
uncertainties are statistical, systematic, and model-dependent,
respectively. Measurements of branching fractions for the modes
B+- --> rho0(1450)pi+- and B+- --> f0(1370)pi+- are also presented.
We observe no significant direct CP asymmetries for the above modes,
and there is no evidence for the decays B+- --> chiC0 pi+-, or
B+- --> chiC2 pi+-.
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