Estimations of Order alphas3 and alphas4 Corrections to Mass-Dependent Observables
K. G. Chetyrkin, B. A. Kniehl, A. Sirlin
Abstract
A simple procedure to estimate O(alphas3) and O(alphas4) corrections to mass-dependent observables is conjectured. The method is tested in a number of cases where the O(alphas3) contribution is exactly known, and reasonable agreement is found.
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