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Threshold expansion of the gg(qq) -> QQ+X cross section at O(alpha_s^4)

Authors
  • Beneke, M.
  • Czakon, M.
  • Falgari, P.
  • Mitov, A.
  • Schwinn, C.
Type
Published Article
Publication Date
Mar 12, 2018
Submission Date
Nov 26, 2009
Identifiers
DOI: 10.1016/j.physletb.2010.05.038
Source
arXiv
License
Yellow
External links

Abstract

We derive the complete set of velocity-enhanced terms in the expansion of the total cross section for heavy-quark pair production in hadronic collisions at next-to-next-to-leading order. Our expression takes into account the effects of soft-gluon emission as well as that of potential-gluon exchanges. We prove that there are no enhancements due to subleading soft-gluon couplings multiplying the leading Coulomb singularity.

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