Integrands of less-supersymmetric Yang-Mills at one loop

We construct a prescriptive, bubble power-counting basis of one-loop integrands suitable for representing amplitude in less-supersymmetric Yang-Mills theory. With the exception massless bubbles, all have unambiguous, leading singularities as coefficients defined field theory; bubbles on external legs, we find two natural choices which lead to different that highlight distinct aspects For concreteness, give all-multiplicity MHV amplitudes, and split-helicity integrand six-particle NMHV. The is mostly pure divided into separately UV- IR-finite sectors fixed transcendental weight, resulting ratio functions n-particle helicity amplitudes.