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;
2007-01-01
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
