1. International Institute of Physics, Federal University of Rio Grande do Norte, Campus Universitário, Lagoa Nova, Natal-RN 59078-970, Brazil
2. Institute for Theoretical and Experimental Physics, B. Cheremushkinskaya 25, Moscow 117218, Russia
3. Department of Theoretical and Experimental Physics, Federal University of Rio Grande do Norte, Campus Universitário, Lagoa Nova, Natal-RN 59078-970, Brazil
4. Federal University of Maranhão, Campus Balsas, rua José Leão 484, Balsas-MA 65800-000, Brazil