We present measurements of the branching fraction B and longitudinal polarization fraction f(L) for B-0 -> a(1)(1260)(+)a(1)(1260)(-) decays, with a(1)(1260)(+/-)->pi(-)pi(+)pi(+/-). The data sample, collected with the BABAR detector at the SLAC National Accelerator Laboratory, represents 465x10(6) produced BB pairs. We measure B(B-0 -> a(1)(1260)(+)a(1)(1260)(-))x[B(a(1)(1260)(+)->pi(-)pi(+)pi(+))](2)= (11.8 +/- 2.6 +/- 1.6)x10(-6) and f(L)=0.31 +/- 0.22 +/- 0.10, where the first uncertainty is statistical and the second systematic. The decay mode is measured with a significance of 5.0 standard deviations including systematic uncertainties.

Observation and polarization measurement of B-0 -> a(1)(1260)(+)a(1)(1260)(-) decay

Baracchini E;Ferroni F;
2009

Abstract

We present measurements of the branching fraction B and longitudinal polarization fraction f(L) for B-0 -> a(1)(1260)(+)a(1)(1260)(-) decays, with a(1)(1260)(+/-)->pi(-)pi(+)pi(+/-). The data sample, collected with the BABAR detector at the SLAC National Accelerator Laboratory, represents 465x10(6) produced BB pairs. We measure B(B-0 -> a(1)(1260)(+)a(1)(1260)(-))x[B(a(1)(1260)(+)->pi(-)pi(+)pi(+))](2)= (11.8 +/- 2.6 +/- 1.6)x10(-6) and f(L)=0.31 +/- 0.22 +/- 0.10, where the first uncertainty is statistical and the second systematic. The decay mode is measured with a significance of 5.0 standard deviations including systematic uncertainties.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12571/493
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