1. Department of Physics and Technology, Russian-Armenian University, 123 Hovsep Emin St., Yerevan 0051, Armenia
2. Department de Física, Universitat de les Illes Balears, E-07122, Palma de Mallorca, Spain
3. Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, 141980, Russia
4. Department of Physics, Yerevan State University, 1 Alex Manoogian St., Yerevan 0051, Armenia