[1] Moscow Engn Phys Inst, Moscow 115409, Russia
[2] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany
[3] RAS, Inst Math Modelling, Moscow 117901, Russia
[4] RAS, MV Keldysh Appl Math Inst, Moscow 117901, Russia
[5] Dublin Inst Adv Studies, Dublin 4, Ireland