The nature of power corrections in large β0 approximation
Abstract
We investigate the nature of power corrections and infrared renormalon singularities in large β0 approximation. We argue that the power correction associated with a renormalon pole singularity should appear at O(1), in contrast to the renormalon ambiguity appearing at O(1/β0), and give an explanation why the leading order renormalon singularities are generically poles.
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