Next-to-leading order calculation of the color-octet 3S1 gluon fragmentation function for heavy quarkonium

Research output: Contribution to journalArticle


Next-to-leading order corrections to fragmentation functions in a light-cone gauge are discussed. This gauge simplifies the calculation by eliminating many Feynman diagrams at the expense of introducing spurious poles in loop integrals. As an application, the short-distance coefficients for the color-octet 3S1 term in the fragmentation function for a gluon to split into polarized heavy quarkonium states are re-calculated to order αs 2. We show that the ill-defined spurious poles cancel and the appropriate prescriptions for the remaining spurious poles can be determined by calculating a subset of the diagrams in the Feynman gauge. Our answer agrees with the recent calculation of Braaten and Lee in the Feynman gauge, but disagrees with another previous calculation.

Original languageEnglish
Pages (from-to)229-231
Number of pages3
JournalInternational Journal of Modern Physics A
Issue numberSUPPL. 1A
Publication statusPublished - 2001 Dec 1
Externally publishedYes


ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Mathematical Physics
  • Nuclear and High Energy Physics

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