Next-to-leading-order electroweak corrections to the production of four charged leptons at the LHC
By Benedikt Biedermann, Ansgar Denner, Stefan Dittmaier, Lars Hofer, Barbara Jäger. Journal of High Energy Physics, 2016
153 citations recorded by the source corpus.
We present a state-of-the-art calculation of the next-to-leading-order electroweak corrections to ZZ production, including the leptonic decays of the Z bosons into μ+μ−e+e− or μ+μ−μ+μ− final states. We use complete leading-order and next-to-leading-order matrix elements for four-lepton production, including contributions of virtual photons and all off-shell effects of Z bosons, where the finite Z-boson width is taken into account using the complex-mass scheme. The matrix elements are implemented into Monte Carlo programs allowing for the evaluation of arbitrary differential distributions. We present integrated and differential cross sections for the LHC at 13 TeV both for an inclusive setup where only lepton identification cuts are applied, and for a setup motivated by Higgs-boson analyses in the four-lepton decay channel. The electroweak corrections are divided into photonic and purely weak contributions. The former show the well-known pronounced tails near kinematical thresholds and resonances; the latter are generically at the level of ∼ −5% and reach several −10% in the high-energy tails of distributions. Comparing the results for μ+μ−e+e− and μ+μ−μ+μ− final states, we find significant differences mainly in distributions that are sensitive to the μ+μ− pairing in the μ+μ−μ+μ− final state. Differences between μ+μ−e+e− and μ+μ−μ+μ− channels due to interferences of equal-flavour leptons in the final state can reach up to 10% in off-shell-sensitive regions. Contributions induced by incoming photons, i.e. photon-photon and quark-photon channels, are included, but turn out to be phenomenologically unimportant.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/d9768e85cc14ecb43de7def7dc687ebbeba4dc4f
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Nuclear and High Energy Physics
- Atlas Collaboration
- Cms Collaboration
- Gudrun Heinrich
- M. Schönherr
- Ansgar Denner
- Stefan Dittmaier
- S. Höche
- Stefan Kallweit
Citations in the corpus
- Les Houches 2017: Physics at TeV Colliders Standard Model Working Group Report (2017, methodology): “A first class of processes which have been calculated with the help of Recola is the production of massive di-bosons at NLO EW: WW [223], ZZ [222,225], and WZ [313].”
- The automation of next-to-leading order electroweak calculations (2018, background): “17) in order to be definite, as representatives of the class of reactions with four final-state leptons; both have been studied before [26, 27, 30, 35, 130, 131].”
- Electroweak radiative corrections for collider physics (2019, methodology): “Complete NLO EW corrections with fully off-shell gauge bosons were presented for WW [332, 357], WZ [632], and ZZ [508, 633] production at the LHC.”