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A search for the exclusive radiative decays B --> rho(770) gamma and B0 -->omega(782) gamma is performed on a sample of about 84\times 10^{6} B\bar Bevents collected by the BaBar detector at the PEP-II asymmetric-energy e+e-storage ring. No significant signal is seen in any of the channels. We setupper limits on the branching fractions of BR(B^0 -> rho^0 gamma) < 1.2 \times10^{-6}, BR(B^+ -> rho^+ gamma) < 2.1 \times 10^{-6}, and BR(B^0 -> omegagamma) < 1.0 \times 10^{-6} at 90% confidence level (C.L.). Using theassumption that Gamma(B --> rho gamma) = Gamma(B+ --> rho+ gamma)=2\times\Gamma(B0 --> rho0 gamma), we find the combined limit BR(B --> rhogamma)<1.9 \times 10^{-6}, corresponding to BR(B --> rho gamma)/\BR(B --> K*gamma) < 0.047 at 90% C.L.Comment: submitted to Phys. Rev. Let

physical review letters

Search for the Radiative Decays<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:mi>ρ</mml:mi><mml:mi>γ</mml:mi></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mo>→</mml:mo><mml:mi>ω</mml:mi><mml:mi>γ</mml:mi></mml:math>

Search for the Radiative DecaysB→ργandB0→ωγ