Electroweak corrections to $pp \to μ^+μ^-e^+e^- + X$ at the LHC -- a Higgs background study

B. Biedermann; A. Denner; S. Dittmaier; L. Hofer; B. Jäger

doi:10.1103/physrevlett.116.161803

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arXiv · 1601.07787

Electroweak corrections to $pp \to μ^+μ^-e^+e^- + X$ at the LHC -- a Higgs background study

B. Biedermann·A. Denner·S. Dittmaier·L. Hofer·B. Jäger

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Abstract

The first complete calculation of the next-to-leading-order electroweak corrections to four-lepton production at the LHC is presented, where all off-shell effects of intermediate Z bosons and photons are taken into account. Focusing on the mixed final state $μ^+μ^-e^+e^-$, we study differential cross sections that are particularly interesting for Higgs-boson analyses. The electroweak corrections are divided into photonic and purely weak corrections. The former exhibit patterns familiar from similar W/Z-boson production processes with very large radiative tails near resonances and kinematical shoulders. The weak corrections are of the generic size of 5% and show interesting variations, in particular a sign change between the regions of resonant Z-pair production and the Higgs signal.

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B. Biedermann, A. Denner, S. Dittmaier, L. Hofer, B. Jäger. 2016-01-28. Electroweak corrections to $pp \to μ^+μ^-e^+e^- + X$ at the LHC -- a Higgs background study. https://doi.org/10.1103/physrevlett.116.161803

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