A New N=4 Membrane Action via Orbifold

Understand

We propose a new Lagrangian describing N=4 superconformal field theory in three dimensions.

• This theory is believed to describe interacting field theory on the worldvolume of a M2-brane on an orbifold, and is obtained as a Z_2-quotient of the theory proposed by Bagger and Lambert.
• Despite unusual Chan-Paton structures, we can take Z_2-orbifold by using SU(2)\times SU(2) bifundamental representations.
• We also analyze the moduli space of this theory and found three branches.