期刊
EUROPEAN PHYSICAL JOURNAL C
卷 78, 期 3, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-018-5732-1
关键词
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资金
- National Science Foundation CAREER award [PHY-1652066]
- Center for Computational Research at the University at Buffalo
- US Department of Energy, Office of Science, Office of High Energy Physics [DE-AC02-07CH11359]
- STFC [ST/G000905/1] Funding Source: UKRI
We calculate the soft function for the global event variable 1-jettiness at next-to-next-to-leading order (NNLO) in QCD. We focus specifically on the non-Abelian contribution, which, unlike the Abelian part, is not determined by the next-to-leading order result. The calculation uses the known general forms for the emission of one and two soft partons and is performed using a sector-decomposition method that is spelled out in detail. Results are presented in the form of numerical fits to the 1-jettiness soft function for LHC kinematics (as a function of the angle between the incoming beams and the final-state jet) and for generic kinematics (as a function of three independent angles). These fits represent one of the needed ingredients for NNLO calculations that use the N-jettiness event variable to handle infrared singularities.
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