Exclusive Radiative B Meson Decays
نویسندگان
چکیده
We have investigated exclusive, radiative B meson decays to charmless mesons (ρ, ω, φ, K(892), K 2 (1430)) in 9.7× 106 BB̄ decays accumulated with the CLEO detector. The B → K(892)γ branching fractions are determined to be B(B0 → K∗0(892)γ) = (4.55 +0.72 −0.68 ± 0.34)×10−5 and B(B+ → K∗+(892)γ) = (3.76 +0.89 −0.83 ± 0.28)×10−5. We have searched for CP asymmetry in B → K(892)γ decays and measure ACP = +0.08 ± 0.13 ± 0.03. We also report the first observation of the decay B → K 2 (1430)γ with a branching fraction of (1.66 −0.53 ± 0.13)×10−5 and determine B(B → K 2 (1430)γ)/B(B → K(892)γ) = 0.39 −0.13 consistent with only one of two available theoretical models. No significant evidence for the decays B → ργ and B0 → ωγ is found and we limit B(B → (ρ/ω)γ)/B(B → K(892)γ) < 0.32 at 90% CL. We also find no evidence for the exotic decay B0 → φγ.
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تاریخ انتشار 1999