Analysis of the semileptonic Bc→Bu *ℓ+ℓ- decay from QCD sum rules T.M. Aliev and M. Savcı Eur. Phys. J. C, 47 2 (2006) 413-421 Published online: 07 June 2006 DOI: 10.1140/epjc/s2006-02579-5