We use the O( αₛ³ ) approximation of the heavy-quark vacuum polarization function in the threshold region to determine the bottom quark mass from nonrelativistic sum rules. We find very good stability and convergence of the perturbative series for the bottom quark mass in MS̄ renormalization scheme. Our final result is m̄b( m̄b )=4.169± 0.008ₜₕ± 0.002_αₛ± 0.002ₑₓₚ .
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