| Abstract |
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We present the results of searches for decays of B mesons to final
states with a b_1 meson and a charged pion or kaon. The data,
collected with the BaBar detector at the Stanford Linear Accelerator
Center, represent 382 million B-Bbar pairs produced in e+e-
annihilation. The results for the branching fractions
are, in units of 10^{-6},
B(B+ -> b1^0 pi+) = 6.7 +/- 1.7 +/- 1.0 (4.0 sigma),
B(B+ -> b1^0 K+ = 9.1+/- 1.7+/- 1.0 (5.3 sigma),
B(B0 -> b1^-/+ pi^+/-) = 10.9 +/- 1.2 +/- 0.9 (8.9 sigma), and
B(B0 -> b1^-K+) = 7.4 +/- 1.0 +/- 1.0 (6.1 sigma),
with the assumption that B(b_1 -> omega pi)=1.
We also measure charge and flavor asymmetries
Ach(B+ -> b1^0 pi+) = 0.05 +/- 0.16 +/- 0.02,
Ach(B+ -> b1^0 K+ = -0.46 +/- 0.20 +/- 0.02,
Ach(B0 -> b1^-/+ pi^+/-) = -0.05 +/- 0.10 +/- 0.02,
C(B0 -> b1^-/+ pi^+/-) = -0.22 +/- 0.23 +/- 0.05,
deltaC(B0 -> b1^-/+ pi^+/-) = -1.04 +/- 0.23 +/- 0.08, and
Ach(B0 -> b1^-K+) = -0.07 +/- 0.12 +/- 0.02,
The first error quoted is statistical, the second systematic, and for
the branching fractions, the significance is given in parentheses.
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