Charmless 2- and 3-body B decays and the angle alpha (phi2)

Details Charmless 2- and 3-body B decays and the angle alpha (phi2) Charmless 2- and 3-body B decays and the angle alpha (phi2)

2004-10-20

arxiv.org/abs/hep-ex/0410056v1

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages, 4 figures, contributed to the Proceedings of ICHEP'04

Scientific paper

We present preliminary measurements of branching fractions and CP-asymmetry parameters in two- and three-body charmless hadronic B decays. The available data sample consists of 227 million Upsilon(4S) B decays collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at SLAC. We establish the observation of the decays B --> pi0 pi0 and B0 --> K0K0bar and constrain the CKM angle alpha with a full SU(2) isospin analysis in the B --> pi pi system and with a B0 --> pi+ pi- pi0 time-dependent Dalitz plot analysis.

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