PHYSICAL REVIEW D, vol.43, no.4, pp.1375-1384, 1991 (SCI-Expanded)
Article / Article
PHYSICAL REVIEW D
Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, INSPEC, zbMATH
Middle East Technical University Affiliated:
We discuss the appearance of theta vacua and solitons with fractional spin in the S2-valued nonlinear sigma model in two space dimensions. We use a formulation of the sigma model in terms of Euler angles and work within the context of canonical quantization. We show that when the model is coupled to an SU(2) topologically massive theory, the theta sectors disappear and the topological mass is not quantized.