We present measurements of the CP-violation parameters S ; C for the radiative decay B0→ηKS0γ; for B→ηKγ we also measure the branching fractions ; for B+→ηK+γ the time-integrated charge asymmetry Ach. The data, collected with the BABAR detector at the Stanford Linear Accelerator Center, represent 465×106 BB̄ pairs produced in e+e- annihilation. The results are S=-0.18-0.46+0.49±0.12, C=-0.32-0.39+0.40±0.07, B(B0→ηK0γ)=(7.1-2.0+2.1±0.4)×10-6, B(B+→ηK+γ)=(7.7±1.0±0.4)×10-6, ; Ach=(-9.0-9.8+10.4±1.4)×10-2. The first error quoted is statistical ; the second systematic. © 2009 The American Physical Society.
Branching fractions ; CP-violating asymmetries in radiative B decays to ηkγ
PALANO, Antimo;PAPPAGALLO, MARCO IGNAZIO;
2009-01-01
Abstract
We present measurements of the CP-violation parameters S ; C for the radiative decay B0→ηKS0γ; for B→ηKγ we also measure the branching fractions ; for B+→ηK+γ the time-integrated charge asymmetry Ach. The data, collected with the BABAR detector at the Stanford Linear Accelerator Center, represent 465×106 BB̄ pairs produced in e+e- annihilation. The results are S=-0.18-0.46+0.49±0.12, C=-0.32-0.39+0.40±0.07, B(B0→ηK0γ)=(7.1-2.0+2.1±0.4)×10-6, B(B+→ηK+γ)=(7.7±1.0±0.4)×10-6, ; Ach=(-9.0-9.8+10.4±1.4)×10-2. The first error quoted is statistical ; the second systematic. © 2009 The American Physical Society.File in questo prodotto:
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