Precision Diboson Observables for the LHC

Abstract

Motivated by the restoration of $SU(2)\times U(1)$ at high energy, we suggest that certain ratios of diboson differential cross sections can be used as high-precision observables at the LHC. We rewrite leading-order diboson partonic cross sections in a form that makes their $SU(2)\times U(1)$ and custodial $SU(2)$ structure more explicit than in previous literature, and identify important aspects of this structure that survive even in hadronic cross sections. We then focus on higher-order corrections to ratios of $\gamma \gamma$, $Z\gamma$ and $ZZ$ processes, including full next-to-leading-order corrections and $gg$ initial-state contributions, and argue that these ratios can likely be predicted to better than $5\%$, which should make them useful in searches for new phenomena. The ratio of $Z\gamma$ to $\gamma \gamma$ is especially promising in the near term, due to large rates and to exceptional cancellations of QCD-related uncertainties. We argue that electroweak corrections are moderate in size, have small uncertainties, and can potentially be observed in these ratios in the long run.

v2, 55 pages, 16 figures, improved discussion of EW corrections

References in corpus (7)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Parton distributions for the LHC
• Vector boson pair production at the LHC
• ZZ production at hadron colliders in NNLO QCD
• $W^{+}{W}^{-}$ production at hadron colliders in NNLO QCD
• Measurement of the pp to ZZ production cross section and constraints on anomalous triple gauge couplings in four-lepton final states at sqrt(s) = 8 TeV
• NLO QCD and electroweak corrections to $Z+\gamma$ production with leptonic Z-boson decays

Cited by in corpus (13)

• Electroweak Precision Tests in High-Energy Diboson Processes
• Heavy Neutrinos with Dynamic Jet Vetoes: Multilepton Searches at $\sqrt{s}=14,27,$ and $100$ TeV
• Multi-Boson Interactions at the LHC
• Fiducial $q_T$ resummation of color-singlet processes at N${}^3$LL+NNLO
• Diboson at the LHC vs LEP
• NNLOPS accurate predictions for $W^{+}{W}^{-}$ production
• Diphoton production at the LHC: a QCD study up to NNLO
• Driving Miss Data: Going up a gear to NNLO
• Precision Measurement with Diboson at the LHC
• NLO QCD+NLO EW corrections to diboson production matched to parton shower
• Safe Jet Vetoes
• Sensitivity on Anomalous Neutral Triple Gauge Couplings via $ZZ$ Production at FCC-hh
• Studies of the energy dependence of diboson polarization fractions and the Radiation Amplitude Zero effect in WZ production with the ATLAS detector