期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 11, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP11(2012)126
关键词
Resummation; Renormalization Group; QCD
资金
- Swiss National Science Foundation (SNF) [200020-140978]
- Schweizerische Universitatskonferenz (SUK/CRUS) [C-13]
- Swiss National Science Foundation (SNF) [200020_140978] Funding Source: Swiss National Science Foundation (SNF)
The resummation for the event-shape variable jet broadening is extended to next-to-next-to-leading logarithmic accuracy by computing the relevant jet and soft functions at one-loop order and the collinear anomaly to two-loop accuracy. The anomaly coefficient is extracted from the soft function and expressed in terms of polylogarithmic as well as elliptic functions. With our results, the uncertainty on jet-broadening distributions is reduced significantly, which should allow for a precise determination of the strong coupling constant from the existing experimental data and provide a consistency check on the extraction of as from higher-log resummations of thrust.
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