期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 6, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP06(2016)065
关键词
NLO Computations
资金
- Deutsche Forschungsgemeinschaft (DFG) [DE 623/2-1]
- Institutional Strategy of the University of Tubingen (DFG) [ZUK 63]
- German Federal Ministry for Education and Research (BMBF) [05H2015]
- DFG through the Research Training Group RTG 2044
- Spanish MINECO of ICCUB (Unidad de Excelencia Maria de Maeztu) [MDM-2014-0369]
- Ministry of Science, Research and the Arts
- Universities of the State of Baden-Wurttemberg, Germany
- [FPA2013-46570-C2-1-P]
- [2014-SGR-104]
We present results of the first calculation of next-to-leading-order electroweak corrections to W-boson pair production at the LHC that fully takes into account leptonic W-boson decays and off-shell effects. Employing realistic event selections, we discuss the corrections in situations that are typical for the study of W-boson pairs as a signal process or of Riggs-boson decays H -> WW*, to which NV-boson pair production represents an irreducible background. In particular, we compare the full off-shell results, obtained treating the NV-boson resonances in the complex-mass scheme, to previous results in the so-called double-pole approximation, which is based on an expansion of the loop amplitudes about the W resonance poles. At small and intermediate scales, i.e. in particular in angular and rapidity distributions, the two approaches show the expected agreement at the level of fractions of a percent, but larger differences appear in the TeV range. For transverse-momentum distributions, the differences can even exceed the 10% level in the TeV range where background diagrams with one instead of two resonant W bosons gain in importance because of recoil effects.
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