We present measurements of the branching fractions, longitudinal polarization, and direct CP-violation asymmetries for the decays B(+) -> rho(0)K*(+) and B(+) -> f(0)(980)K*(+) with a sample of (467 +/- 5) x 10(6)B (B) over bar pairs collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at the SLAC National Accelerator Laboratory. We observe B(+) -> rho(0)K*(+) with a significance of 5: 3 sigma and measure the branching fraction B(B(+) -> rho(0)K*(+)) = (4.6 +/- 1.0 +/- 0.4) x 10(-6), the longitudinal polarization f(L) = 0.78 +/- 0.12 +/- 0.03, and the CP-violation asymmetry A(CP) = 0.31 +/- 0.13 +/- 0.03. We observe B(+) -> f(0)(980)K*(+) and measure the branching fraction B(B(+) -> f(0)(980)K*(+)) x B(f(0)(980) -> pi(+)pi(-)) = (4.2 +/- 0.6 +/- 0.3) x 10(-6) and the CP-violation asymmetry A(CP) = 0.15 +/- 0.12 +/- 0.03. The first uncertainty quoted is statistical and the second is systematic.

Measurements of branching fractions, polarizations, and direct CP-violation asymmetries in B(+) -> rho(0)K*(+) and B(+) -> f(0)(980)K*(+) decays RID C-5223-2009

LUSIANI, Alberto;
2011

Abstract

We present measurements of the branching fractions, longitudinal polarization, and direct CP-violation asymmetries for the decays B(+) -> rho(0)K*(+) and B(+) -> f(0)(980)K*(+) with a sample of (467 +/- 5) x 10(6)B (B) over bar pairs collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at the SLAC National Accelerator Laboratory. We observe B(+) -> rho(0)K*(+) with a significance of 5: 3 sigma and measure the branching fraction B(B(+) -> rho(0)K*(+)) = (4.6 +/- 1.0 +/- 0.4) x 10(-6), the longitudinal polarization f(L) = 0.78 +/- 0.12 +/- 0.03, and the CP-violation asymmetry A(CP) = 0.31 +/- 0.13 +/- 0.03. We observe B(+) -> f(0)(980)K*(+) and measure the branching fraction B(B(+) -> f(0)(980)K*(+)) x B(f(0)(980) -> pi(+)pi(-)) = (4.2 +/- 0.6 +/- 0.3) x 10(-6) and the CP-violation asymmetry A(CP) = 0.15 +/- 0.12 +/- 0.03. The first uncertainty quoted is statistical and the second is systematic.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/4459
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