Interacting scalar field theory in $\kappa$-Minkowski spacetime
  We construct an complex scalar field theory in $\kappa$-Minkowksi spacetime, which respects $\kappa$-deformed Poincar\'e symmetry. One-loop calculation shows that the theory is finite and needs finite renormalization to be compatible with the $\kappa \to \infty$ limit. The loop result also has an imaginary valued correction due to the complex poles present in the propagator. 
Chaiho Rim