• DOI:10.1007/JHEP06(2016)065
• Corpus ID: 119195702

Next-to-leading-order electroweak corrections to pp → W+W− → 4 leptons at the LHC

@article{Biedermann2016NexttoleadingorderEC,
  title={Next-to-leading-order electroweak corrections to pp → W+W− → 4 leptons at the LHC},
  author={Benedikt Biedermann and Marina Billoni and Ansgar Denner and Stefan Dittmaier and Lars Hofer and Barbara J{\"a}ger and Lukas Salfelder},
  journal={Journal of High Energy Physics},
  year={2016},
  volume={2016},
  pages={1-32}
}

• B. Biedermann, M. Billoni, +4 authors L. Salfelder
• Published 11 May 2016
• Physics
• Journal of High Energy Physics

A bstractWe 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 Higgs-boson decays H → WW∗, to which W-boson pair production represents an irreducible background. In particular, we compare the full off-shell results, obtained treating the W-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.