期刊
PHYSICAL REVIEW D
卷 86, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.86.054026
关键词
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资金
- Swiss National Science Foundation (SNF) [200020-140978]
- Innovations- und Kooperationsprojekt of the Schweizerische Universitatskonferenz (SUK/CRUS) [C-13]
- U.S. Department of Energy [DE-SC003916]
- Swiss National Science Foundation (SNF) [200020_140978] Funding Source: Swiss National Science Foundation (SNF)
The differential p(T) spectrum for vector boson production is computed at next-to-leading fixed order and including the resummation of threshold logarithms at next-to-next-to-leading logarithmic accuracy. A comparison is made to ATLAS data on direct photon and W production at high transverse momentum p(T), finding excellent agreement. The resummation is achieved by factorizing contributions associated with different scales using soft-collinear effective theory. Each part is then calculated perturbatively and the individual contributions are combined using renormalization group methods. A key advantage of the effective theory framework is that it indicates a set of natural scale choices, in contrast to the fixed-order calculation. Resummation of logarithms of ratios of these scales leads to better agreement with data and reduced theoretical uncertainties.
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