@article{DennerLangUccirati2017,
  author    = {Denner, Ansgar and Lang, Jean-Nicolas and Uccirati, Sandro},
  title     = {NLO electroweak corrections in extended Higgs sectors with RECOLA2},
  series = {Journal of High Energy Physics},
  volume    = {7},
  journal   = {Journal of High Energy Physics},
  number    = {87},
  doi       = {10.1007/JHEP07(2017)087},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-170673},
  year      = {2017},
  abstract  = {We present the computer code RECOLA2 along with the first NLO electroweak corrections to Higgs production in vector-boson fusion and updated results for Higgs strahlung in the Two-Higgs-Doublet Model and Higgs-Singlet extension of the Standard Model. A fully automated procedure for the generation of tree-level and one-loop matrix elements in general models, including renormalization, is presented. We discuss the application of the Background-Field Method to the extended models. Numerical results for NLO electroweak cross sections are presented for different renormalization schemes in the Two-Higgs-Doublet Model and the Higgs-Singlet extension of the Standard Model. Finally, we present distributions for the production of a heavy Higgs boson.},
  language  = {en}
}
@article{DennerLangPellenetal.2017,
  author    = {Denner, Ansgar and Lang, Jean-Nicolas and Pellen, Mathieu and Uccirati, Sandro},
  title     = {Higgs production in association with off-shell top-antitop pairs at NLO EW and QCD at the LHC},
  series = {Journal of High Energy Physics},
  journal   = {Journal of High Energy Physics},
  number    = {2},
  doi       = {10.1007/JHEP02(2017)053},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-171871},
  year      = {2017},
  abstract  = {We present NLO electroweak corrections to Higgs production in association with off-shell top-antitop quark pairs. The full process pp → e +νeµ -ν¯µbb¯H is considered, and hence all interference, off-shell, and non-resonant contributions are taken into account. The electroweak corrections turn out to be below one per cent for the integrated cross section but can exceed 10\% in certain phase-space regions. In addition to its phenomenological relevance, the computation constitutes a major technical achievement as the full NLO virtual corrections involving up to 9-point functions have been computed exactly. The results of the full computation are supported by two calculations in the double-pole approximation. These also allow to infer the effect of off-shell contributions and emphasise their importance especially for the run II of the LHC. Finally, we present combined predictions featuring both NLO electroweak and QCD corrections in a common set-up that will help the experimental collaborations in their quest of precisely measuring the aforementioned process.},
  language  = {en}
}
@article{DennerJennichesLangetal.2016,
  author    = {Denner, Ansgar and Jenniches, Laura and Lang, Jean-Nicolas and Sturm, Christian},
  title     = {Gauge-independent (MS)over-bar renormalization in the 2HDM},
  series = {Journal of High Energy Physics},
  volume    = {09},
  journal   = {Journal of High Energy Physics},
  number    = {115},
  doi       = {10.1007/JHEP09(2016)115},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-166402},
  year      = {2016},
  abstract  = {We present a consistent renormalization scheme for the CP-conserving Two-Higgs-Doublet Model based on (MS)over-bar renormalization of the mixing angles and the soft-Z 2-symmetry-breaking scale M sb in the Higgs sector. This scheme requires to treat tadpoles fully consistently in all steps of the calculation in order to provide gauge-independent S-matrix elements. We show how bare physical parameters have to be defined and verify the gauge independence of physical quantities by explicit calculations in a general R ξ -gauge. The procedure is straightforward and applicable to other models with extended Higgs sectors. In contrast to the proposed scheme, the (MS)over-bar renormalization of the mixing angles combined with popular on-shell renormalization schemes gives rise to gauge-dependent results already at the one-loop level. We present explicit results for electroweak NLO corrections to selected processes in the appropriately renormalized Two-Higgs-Doublet Model and in particular discuss their scale dependence.},
  language  = {en}
}