A search of the exclusive radiative decays B→ρ(770)γ and B0→ω(782)γ is performed on a sample of about 84×10^6 BB̅ events collected by the BABAR detector at the SLAC PEP-II asymmetric-energy e+e- storage ring. No significant signal is seen in any of the channels. We set upper limits on the branching fractions B of B(B0→ρ0γ)<1.2×10-6, B(B+→ρ+γ)<2.1×10-6, and B(B0→ωγ)<1.0×10-6 at 90% confidence level (C.L.). Using the assumption that Γ(B→ργ)=Γ(B+→ρ+γ)=2×Γ(B0→ρ0γ), we find the combined limit B(B→ργ)<1.9×10-6, corresponding to B(B→ργ)/B(B→K*γ)<0.047 at 90% C.L.
Search for the Radiative Decays B→ργ and B0→ωγ
MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;VOCI, CESARE;SIMI, GABRIELE;
2004
Abstract
A search of the exclusive radiative decays B→ρ(770)γ and B0→ω(782)γ is performed on a sample of about 84×10^6 BB̅ events collected by the BABAR detector at the SLAC PEP-II asymmetric-energy e+e- storage ring. No significant signal is seen in any of the channels. We set upper limits on the branching fractions B of B(B0→ρ0γ)<1.2×10-6, B(B+→ρ+γ)<2.1×10-6, and B(B0→ωγ)<1.0×10-6 at 90% confidence level (C.L.). Using the assumption that Γ(B→ργ)=Γ(B+→ρ+γ)=2×Γ(B0→ρ0γ), we find the combined limit B(B→ργ)<1.9×10-6, corresponding to B(B→ργ)/B(B→K*γ)<0.047 at 90% C.L.File in questo prodotto:
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