1. Budker Institute of Nuclear Physics, 630090, Novosibirsk, Russia, a.v.anikeev@inp.nsk.su
2. Novosibirsk State University, 630090, Novosibirsk, Russia
3. Karlsruhe Institute of Technology, KIT, Karlsruhe, Germany
4. Forschungszenrum Dresden-Rossendorf, Dresden, Germany