We present measurements of branching fractions and charge asymmetries for six B-meson decay modes with an eta or eta' meson in the final state. The data sample corresponds to 232 x 10(6) BB pairs collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) B Factory at SLAC. We measure the branching fractions (in units of 10(-6)): B(B+ -> eta pi(+)) = 5.1 +/- 0.6 +/- 0.3, B(B+ -> eta K+) = 3.3 +/- 0.6 +/- 0.3, B(B-0 -> eta K-0) = 1.5 +/- 0.7 +/- 0.1 (< 2.5 at 90% C.L.), B(B+ -> eta rho(+)) = 8.4 +/- 1.9 +/- 1.1, B(B-0 -> eta omega) = 1.0 +/- 0.5 +/- 0.2 (< 1.9 at 90% C.L.), and B(B+ -> eta'pi(+)) = 4.0 +/- 0.8 +/- 0.4, where the first uncertainty is statistical and second systematic. For the charged modes we also determine the charge asymmetries, all found to be compatible with zero.

Measurement of branching fractions and charge asymmetries in B+ decays to eta pi(+), eta K+, eta rho(+), and eta(')pi(+), and search for B-0 decays to eta K-0 and eta omega

FERRONI, Fernando
2005

Abstract

We present measurements of branching fractions and charge asymmetries for six B-meson decay modes with an eta or eta' meson in the final state. The data sample corresponds to 232 x 10(6) BB pairs collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) B Factory at SLAC. We measure the branching fractions (in units of 10(-6)): B(B+ -> eta pi(+)) = 5.1 +/- 0.6 +/- 0.3, B(B+ -> eta K+) = 3.3 +/- 0.6 +/- 0.3, B(B-0 -> eta K-0) = 1.5 +/- 0.7 +/- 0.1 (< 2.5 at 90% C.L.), B(B+ -> eta rho(+)) = 8.4 +/- 1.9 +/- 1.1, B(B-0 -> eta omega) = 1.0 +/- 0.5 +/- 0.2 (< 1.9 at 90% C.L.), and B(B+ -> eta'pi(+)) = 4.0 +/- 0.8 +/- 0.4, where the first uncertainty is statistical and second systematic. For the charged modes we also determine the charge asymmetries, all found to be compatible with zero.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.12571/2928
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