Short Distance Mass of a Heavy Quark at Order α_s^3

Abstract

The relation between the on-shell quark mass and the mass defined in the modified minimal subtraction scheme is computed up to order α_s^3. Implications for the numerical values of the top and bottom quark masses are discussed. We show that the new three-loop correction significantly reduces the theoretical uncertainty in the determination of the quark masses.

Latex, 5 pages

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