We present measurements of the branching fractions for the decays B±→a1±(1260)π0 and B±→a10(1260)π± from a data sample of 232×106 BB̄ pairs produced in e+e- annihilation through the Υ(4S) resonance. We measure the branching fraction B(B±→a1±(1260)π0)×B(a1±(1260) →π-π+π±)=(13.2±2.7±2.1)×10-6 with a significance of 4.2σ, and the branching fraction B(B±→ a10(1260)π±)×B(a10(1260)→π-π+π0)=(20.4±4. 7±3.4)×10-6 with a significance of 3.8σ, where the first error quoted is statistical and the second is systematic.

Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J., Poireau, V., et al. (2007). Evidence for charged B meson decays to a1±(1260)π0 and a10(1260)π±. PHYSICAL REVIEW LETTERS, 99(26) [10.1103/PhysRevLett.99.261801].

Evidence for charged B meson decays to a1±(1260)π0 and a10(1260)π±

CARPINELLI, Massimo;
2007

Abstract

We present measurements of the branching fractions for the decays B±→a1±(1260)π0 and B±→a10(1260)π± from a data sample of 232×106 BB̄ pairs produced in e+e- annihilation through the Υ(4S) resonance. We measure the branching fraction B(B±→a1±(1260)π0)×B(a1±(1260) →π-π+π±)=(13.2±2.7±2.1)×10-6 with a significance of 4.2σ, and the branching fraction B(B±→ a10(1260)π±)×B(a10(1260)→π-π+π0)=(20.4±4. 7±3.4)×10-6 with a significance of 3.8σ, where the first error quoted is statistical and the second is systematic.
Articolo in rivista - Articolo scientifico
Data reduction; Error analysis; Resonance; Statistical methods; Branching fractions; Meson decays; Bosons;
English
B. Aubert et al. (BABAR Collaboration)
Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J., Poireau, V., et al. (2007). Evidence for charged B meson decays to a1±(1260)π0 and a10(1260)π±. PHYSICAL REVIEW LETTERS, 99(26) [10.1103/PhysRevLett.99.261801].
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