Affiliation: | 1. Departamento de Física Teórica, Instituto de Física, UERJ - Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier 524, 20550-013 Maracanã, Rio de Janeiro, Brazil;2. Ghent University, Department of Physics and Astronomy, Krijgslaan 281-S9, 9000 Gent, Belgium;3. Institut für Theoretische Physik, Heidelberg University, Philosophenweg 16, 69120 Heidelberg, Germany |