期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 2, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP02(2014)004
关键词
Resummation; QCD; Standard Model
资金
- KITP Santa Barbara
- ESI Vienna
- Swiss National Science Foundation (SNF) [200020-140978]
- University Research Fellowship by the Royal Society
- Swiss National Science Foundation (SNF) [200020_140978] Funding Source: Swiss National Science Foundation (SNF)
We obtain the next-to-next-to-leading order corrections to transversemomentum spectra of W, Z and Higgs bosons near the partonic threshold. In the threshold limit, the electroweak boson recoils against a low-mass jet and all radiation is either soft, or collinear to the jet or the beam directions. We extract the virtual corrections from known results for the relevant two-loop four-point amplitudes and combine them with the soft and collinear two-loop functions as defined in Soft-Collinear Effective Theory. We have implemented these results in a public code PeTeR and present numerical results for the threshold resummed cross section of W and Z bosons at next-to-next-to-next-toleading logarithmic accuracy, matched to next-to-leading fixed-order perturbation theory. The two-loop corrections lead to a moderate increase in the cross section and reduce the scale uncertainty by about a factor of two. The corrections are significantly larger for Higgs production.
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