We present updated measurements of the branching fractions and CP asymmetries for B0→π0π0, B±→π±π0, and B±→K±π0. Based on a sample of 383×106 Υ(4S)→BB̄ decays collected by the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC, we measure B(B0→π0π0)=(1. 47±0.25±0.12)×10-6, B(B±→π±π0)=(5. 02±0.46±0.29)×10-6, and B(B±→K±π0)= (13.6±0.6±0.7)×10-6. We also measure the CP asymmetries Cπ0π0=-0.49±0.35±0.05, Aπ±π0=0.03±0. 08±0.01, and AK±π0=0.030±0.039±0.010. Finally, we present bounds on the Cabibbo-Kobayashi-Maskawa angle α using isospin relations.

Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J., Poireau, V., et al. (2007). Study of B0→π0π0, B±→π±π0, and B±→K±π0 decays, and isospin analysis of B→ππ decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 76(9) [10.1103/PhysRevD.76.091102].

Study of B0→π0π0, B±→π±π0, and B±→K±π0 decays, and isospin analysis of B→ππ decays

CARPINELLI, Massimo;
2007

Abstract

We present updated measurements of the branching fractions and CP asymmetries for B0→π0π0, B±→π±π0, and B±→K±π0. Based on a sample of 383×106 Υ(4S)→BB̄ decays collected by the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC, we measure B(B0→π0π0)=(1. 47±0.25±0.12)×10-6, B(B±→π±π0)=(5. 02±0.46±0.29)×10-6, and B(B±→K±π0)= (13.6±0.6±0.7)×10-6. We also measure the CP asymmetries Cπ0π0=-0.49±0.35±0.05, Aπ±π0=0.03±0. 08±0.01, and AK±π0=0.030±0.039±0.010. Finally, we present bounds on the Cabibbo-Kobayashi-Maskawa angle α using isospin relations.
Articolo in rivista - Articolo scientifico
BABAR detector
English
2007
76
9
091102
none
Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J., Poireau, V., et al. (2007). Study of B0→π0π0, B±→π±π0, and B±→K±π0 decays, and isospin analysis of B→ππ decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 76(9) [10.1103/PhysRevD.76.091102].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389666
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