Quantum Electrodynamics

Is it possible that we can do quantum electrodynamics replacing the propagator 1/k² by −   1 k 2   λ 2 ( k 2   −   λ 2 ) https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429492501/e6a0c676-1f8d-4684-97a0-6bf3353f7ce0/content/eq653.tif"/>