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  • 标题:The nonplanar cusp and collinear anomalous dimension at four loops in ${\mathcal N} = 4$ SYM theory
  • 本地全文:下载
  • 作者:R.Boels ; T.Huber ; G.Yang
  • 期刊名称:PoS - Proceedings of Science
  • 印刷版ISSN:1824-8039
  • 出版年度:2017
  • 卷号:290
  • DOI:10.22323/1.290.0042
  • 语种:English
  • 出版社:SISSA, Scuola Internazionale Superiore di Studi Avanzati
  • 摘要:We present numerical results for the nonplanar lightlike cusp and collinear anomalous dimension at four loops in ${\mathcal N} = 4$ SYM theory, which we infer from a calculation of the Sudakov form factor. The latter is expressed as a rational linear combination of uniformly transcendental integrals for arbitrary colour factor. Numerical integration in the nonplanar sector reveals explicitly the breakdown of quadratic Casimir scaling at the four-loop order. A thorough analysis of the reported numerical uncertainties is carried out.
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