Machine-enhanced CP-asymmetries in the Higgs sector

Abstract

Improving the sensitivity to CP-violation in the Higgs sector is one of the pillars of the precision Higgs programme at the Large Hadron Collider. We present a simple method that allows CP-sensitive observables to be directly constructed from the output of neural networks. We show that these observables have improved sensitivity to CP-violating effects in the production and decay of the Higgs boson, when compared to the use of traditional angular observables alone. The kinematic correlations identified by the neural networks can be used to design new analyses based on angular observables, with a similar improvement in sensitivity.

arXiv comment10 pages, 7 figures, 2 tables, v2: added clarifications, references updated, v3: version published in PLB

References in corpus (27)

• A Brief Introduction to PYTHIA 8.1
• A Unified Approach to the Classical Statistical Analysis of Small Signals
• Parton distributions with LHC data
• Determining the Structure of Higgs Couplings at the LHC
• On the spin and parity of a single-produced resonance at the LHC
• Anomalous Higgs boson couplings in vector boson fusion at the CERN LHC
• Identifying the Higgs Spin and Parity in Decays to Z Pairs
• Constraining anomalous Higgs boson couplings to the heavy flavor fermions using matrix element techniques
• Prospective Analysis Spin- and CP-sensitive Variables in H -> ZZ -> l_1 l_1 l_2 l_2 with Atlas
• Higgs look-alikes at the LHC
• Boosting the Direct CP Measurement of the Higgs-Top Coupling
• Test of CP Invariance in vector-boson fusion production of the Higgs boson using the Optimal Observable method in the ditau decay channel with the ATLAS detector
• Better Higgs-CP Tests Through Information Geometry
• Measurements of the Higgs boson inclusive and differential fiducial cross sections in the 4$\ell$ decay channel at $\sqrt{s}$ = 13 TeV
• Measuring spin and CP from semi-hadronic ZZ decays using jet substructure
• New features in the JHU generator framework: constraining Higgs boson properties from on-shell and off-shell production
• Unveiling CP property of top-Higgs coupling with graph neural networks at the LHC
• Test of CP invariance in vector-boson fusion production of the Higgs boson in the $H\to \tau \tau$ channel in proton$-$proton collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• SMEFT analysis of vector boson scattering and diboson data from the LHC Run II
• Gauge fixing the Standard Model Effective Field Theory
• Angles on CP-violation in Higgs boson interactions
• Optimized probes of $CP$-odd effects in the $t\bar{t}h$ process at hadron colliders
• Gluon-fusion contributions to Phi + 2 Jet production
• Higgs boson production in association with three jets via gluon fusion at the LHC: Gluonic contributions
• SM EFT effects in Vector-Boson Scattering at the LHC
• Effective field theory versus UV-complete model: vector boson scattering as a case study
• T-odd Asymmetry in W+jet Events at the LHC

Cited by in corpus (6)

• Constraining the CP structure of Higgs-fermion couplings with a global LHC fit, the electron EDM and baryogenesis
• CP-violation, Asymmetries and Interferences in $t\bar{t}\varphi$
• Simulation-based inference in the search for CP violation in leptonic WH production
• Sensitivity to $\mathcal{C}\mathcal{P}$-violating effective couplings in the top-Higgs sector
• Equivariant neural networks for robust $\text{CP}$ observables
• Measurements and interpretations of $W^{\pm }Z$ production cross-sections in $pp$ collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector