Renormalons and 1/Q² Corrections

الأصل · EN

We argue that the appearance of the Landau pole in the running coupling of QCD introduces 1/Q² power corrections in current correlation functions. These terms are not accounted for by the standard operator product expansion and is the price to be paid for the lack of a unique definition of the running coupling at the 1/Q² level. We review also possible phenomenological implications of the 1/Q² terms in an alternative language of the ultraviolet renormalon.