Quantisation of $O(N)$ invariant nonlinear sigma model in the Batalin-Tyutin formalism

N. Banerjee, Subir Ghosh, R. Banerjee

We quantise the $O(N)$ nonlinear sigma model using the Batalin Tyutin (BT) approach of converting a second class system into first class. It is a {\it nontrivial} application of th…