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Description:
We estimate the beyond the Standard Model (SM) contribution to the B-s,B-d -> gamma gamma double radiative decay in the framework of the model with one universal extra dimension. This contribution gives a similar to 3(6)% enhancement of the branching ratio calculated in the SM for B-s(d) -> gamma gamma (without QCD corrections). (c) 2006 Elsevier B.V. All rights reserved.