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Search for the decay B0 --> J/psi gamma

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arxiv hep-ex/0408018 v1 pith:GIUXSOPI submitted 2004-08-06 hep-ex

Search for the decay B0 --> J/psi gamma

classification hep-ex
keywords gammadecaysearchasymmetric-energyb-barbabarcollectedconfidence
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present the results of a search for the radiative decay B0 --> J/psi gamma in a data set containing 123 million Y(4S)--> B B-bar decays, collected by the BABAR detector at the PEP-II asymmetric-energy e+e- storage ring at SLAC. We find no evidence for a signal and place an upper limit of B(B0 --> J/psi gamma) < 1.6 x 10^-6 at 90% confidence level.

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  1. Search for the decays $B_{(s)}^0\to J/\psi\gamma$ at LHCb

    hep-ex 2026-04 accept novelty 3.0

    Upper limits of 2.9×10^{-6} for B_s^0 and 2.5×10^{-6} for B^0 on the branching fractions to J/ψγ at 90% CL, with the B_s limit improved by a factor of 2.5.