On a conjecture by 't Hooft and Veltman

The conjecture by 't Hooft and Veltman that ∫ d2ωq (q2) λ − 1 = 0 (ω, λ complex), within the context of dimensional regularization, is proven in the case of zero‐mass particles for any ω when λ = 1,2,… and for λ = 0 in the limit ω → 2.