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More about on the short distance contribution to the B-c -> B-u*gamma decay

We calculate the transition form factor for the B-c --> B-u*gamma decay taking into account only the short distance contribution, in framework of QCD sum rules method. We observe that the transition form factor predicted by the QCD sum rules method is approximately two times larger compared to the result predicted by the Isgur, Scora, Grinstein and Wise model. (C) 2000 Elsevier Science B.V. All rights reserved.