Ultrasoft contribution to heavy-quark pair production near threshold


We compute the third-order correction to the heavy-quark current correlation function due to the emission and absorption of an ultrasoft gluon. Our result supplies a missing contribution to top-quark pair production near threshold and the determination of the bottom quark mass from QCD sum rules. PACS numbers: 12.38.Bx, 13.66.Jn, 14.65.Fy, 14.65.Ha In a… (More)

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