2016/05/11 by B. Biedermann, Benedikt Biedermann, Marina Billoni +11 · 51 citations
Computer Science · Physics and Astronomy · #Amplitude #Boson #Computational Physics and Python Applications #Electroweak interaction #Large Hadron Collider #Lepton #Neutrino Physics Research #Particle physics theoretical and experimental studies #Rapidity #Recoil #Resonance (particle physics) #hep-ex #hep-ph
paper · pdf · doi:10.1007/jhep06(2016)065
published in Journal of High Energy Physics 2016(6) (Springer Nature) · 28 pages, 18 eps-figures
arxiv created 2016/05/11 · openalex publication_date 2016/06/01 · openalex created_date 2016/06/24 · arxiv updated 2016/06/29 · openalex updated_date 2026/08/05
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 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.