B_c -> l nu gamma decay in light cone QCD
  The radiative B_c -> l nu gamma decay is investigated in the Standard Model in framework of the light cone QCD. The transition form factors and decay width are calculated. A comparison of light cone QCD and constituent quark model predictions on these quantities is presented. 
T. M. Aliev(Girne American University), M. Savci (Middle East   Technical University, Ankara-Turkey)