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We compute three-loop corrections to the relation between the heavy quark masses defined in the pole and kinetic schemes. Using known relations between the pole and MS[over ¯] quark masses, we can establish precise relations between the kinetic and MS[over ¯] charm and bottom masses. As compared to two loops, the precision is improved by a factor of 2 to 3. Our results constitute important ingredients for the precise determination of the Cabibbo-Kobayashi-Maskawa matrix element |V_cb| at Belle II.For most chiralities, semiconducting nan
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