We search for the decay B0 → ρ0ρ 0 in a data sample of about 227 × 106 Γ(4S) → B B̄ decays collected with the BABAR detector at the PEP-II asymmetric-energy e+ e- collider at SLAC. We find no significant signal and set an upper limit of 1.1 × 10-6 at 90% C.L. on the branching fraction. As a result, the uncertainty due to penguin contributions on the Cabibbo-Kobayashi-Maskawa unitarity angle α measured in B → ρρ decays is decreased to 11° at 68% C.L. © 2005 The American Physical Society.

Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2005). Limit on the B0→ρ0ρ0 branching fraction and implications for the Cabibbo-Kobayashi-Maskawa Angle α. PHYSICAL REVIEW LETTERS, 94(13), 1-7 [10.1103/PhysRevLett.94.131801].

Limit on the B0→ρ0ρ0 branching fraction and implications for the Cabibbo-Kobayashi-Maskawa Angle α

PATRIGNANI, CLAUDIA;
2005

Abstract

We search for the decay B0 → ρ0ρ 0 in a data sample of about 227 × 106 Γ(4S) → B B̄ decays collected with the BABAR detector at the PEP-II asymmetric-energy e+ e- collider at SLAC. We find no significant signal and set an upper limit of 1.1 × 10-6 at 90% C.L. on the branching fraction. As a result, the uncertainty due to penguin contributions on the Cabibbo-Kobayashi-Maskawa unitarity angle α measured in B → ρρ decays is decreased to 11° at 68% C.L. © 2005 The American Physical Society.
2005
Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2005). Limit on the B0→ρ0ρ0 branching fraction and implications for the Cabibbo-Kobayashi-Maskawa Angle α. PHYSICAL REVIEW LETTERS, 94(13), 1-7 [10.1103/PhysRevLett.94.131801].
Aubert, B; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Tisserand, V.; Zghiche, A.; Grauges-Pous, E.; Palano, A.; P...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/552118
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