We present measurements of the branching fractions for the decays B-+/--> a(1)(+/-)(1260)pi(0) and B-+/--> a(1)(0)(1260)pi(+/-) from a data sample of 232x10(6) B(B)over-bar pairs produced in e(+)e(-) annihilation through the Upsilon(4S) resonance. We measure the branching fraction B(B-+/--> a(1)(+/-)(1260)pi(0))xB(a(1)(+/-)(1260)->pi(-)pi(+)pi(+/-))=(13.2 +/- 2.7 +/- 2.1)x10(-6) with a significance of 4.2 sigma, and the branching fraction B(B-+/--> a(1)(0)(1260)pi(+/-))xB(a(1)(0)(1260)->pi(-)pi(+)pi(0))=(20.4 +/- 4.7 +/- 3.4)x10(-6) with a significance of 3.8 sigma, where the first error quoted is statistical and the second is systematic.

Evidence for charged B meson decays to a(1)(+/-)(1260)pi(0) and a(1)(0)(1260)pi(+/-)

Baracchini E;Ferroni F;
2007

Abstract

We present measurements of the branching fractions for the decays B-+/--> a(1)(+/-)(1260)pi(0) and B-+/--> a(1)(0)(1260)pi(+/-) from a data sample of 232x10(6) B(B)over-bar pairs produced in e(+)e(-) annihilation through the Upsilon(4S) resonance. We measure the branching fraction B(B-+/--> a(1)(+/-)(1260)pi(0))xB(a(1)(+/-)(1260)->pi(-)pi(+)pi(+/-))=(13.2 +/- 2.7 +/- 2.1)x10(-6) with a significance of 4.2 sigma, and the branching fraction B(B-+/--> a(1)(0)(1260)pi(+/-))xB(a(1)(0)(1260)->pi(-)pi(+)pi(0))=(20.4 +/- 4.7 +/- 3.4)x10(-6) with a significance of 3.8 sigma, where the first error 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/20.500.12571/1482
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