Measurement of the weak phase alpha from B0 --> a_1(1260)+- pi-+ decays

Details Measurement of the weak phase alpha from B0 --> a_1(1260)+- pi-+ decays Measurement of the weak phase alpha from B0 --> a_1(1260)+- pi-+ decays

2011-01-04

arxiv.org/abs/1101.0845v2

Physics

High Energy Physics

High Energy Physics - Experiment

Proceedings of CKM2010, the 6th International Workshop on the CKM Unitarity Triangle, University of Warwick, UK, 6-10 Septembe

Scientific paper

We present the measurement, performed by the BABAR Collaboration, of the weak
phase alpha from the time dependent CP asymmetries in B0--> a_1(1260)+- pi-+
decays. The model error induced by penguin contributions to the B0 -->
a_1(1260)+- pi-+ channel is estimated from an SU(3) analysis of the branching
fractions of B--> a_1(1260) K, B--> K_1(1270) pi, and B--> K_1(1400) pi decays.

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