Systematic Analytic Regularization in ${\phi }^4$ and Yukawa Theories

We introduce a novel regularization scheme: Systematic Analytic Regularization (SAR). SAR regularizes a theory at the level of the action by analytically continuing the power of the kinetic operator, ensuring that the theory is formally finite before any terms in the Dyson series are evaluated. We demonstrate that SAR fully and self-consistently regularizes ${\phi }^4$ and Yukawa theories at NLO.