Ultrasoft contribution to heavy-quark pair production near threshold

Abstract

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.

10 pages, LaTeX

References in corpus (3)

• Ultrasoft contribution to quarkonium production and annihilation
• NNNLO results on top-quark pair production near threshold
• NNNLO correction to the toponium and bottomonium wave-functions at the origin

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