Detecting anomaly in vector boson scattering

Abstract

Measuring the vector boson scattering (VBS) precisely is an important step towards understanding the electroweak symmetry breaking of the standard model (SM) and detecting new physics beyond the SM. We propose a neural network which compress the features of the VBS into three dimensional latent space. The consistency of the SM prediction and the experimental data is tested by the binned log-likelihood analysis in the latent space. We will show that the network is capable of distinguish different polarization modes of $WWjj$ production in both dileptonic channel and semi-leptonic channel. The method is also applied to constrain the effective field theory and two Higgs Doublet Model. The results demonstrate that the method is sensitive to generic new physics contributing to the VBS.

23 panges, 12 figures, to be published in Chinese Physics C

References in corpus (17)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Herwig++ Physics and Manual
• Models of Yukawa interaction in the two Higgs doublet model, and their collider phenomenology
• Extending the Bump Hunt with Machine Learning
• Measurement of the charm fragmentation function in D* photoproduction at HERA
• Evidence for Electroweak Production of $W^{\pm }{W}^{\pm }jj$ in $pp$ Collisions at $\sqrt{s}=8$ TeV with the ATLAS Detector
• Study of vector boson scattering and search for new physics in events with two same-sign leptons and two jets
• Measurement of vector boson scattering and constraints on anomalous quartic couplings from events with four leptons and two jets in proton-proton collisions at sqrt(s) = 13 TeV
• Measurement of electroweak WZ boson production and search for new physics in WZ $+$ two jets events in pp collisions at $\sqrt{s}=$ 13 TeV
• Complete NLO corrections to ${\mathrm{W}}^{+}{\mathrm{W}}^{+}$ scattering and its irreducible background at the LHC
• Different polarization definitions in same-sign $WW$ scattering at the LHC
• Vector boson polarizations in the decay of the Standard Model Higgs
• Vector-Boson Fusion and Vector-Boson Scattering
• Search for a low-mass ${\tau }^{-}{\tau }^{+}$ resonance in association with a bottom quark in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Tree-level Interference in VBF production of Vh
• Measuring the polarization of boosted, hadronic $W$ bosons with jet substructure observables
• Higgs, top and electro-weak precision measurements at future $e^{+}{e}^{-}$ colliders; a combined effective field theory analysis with renormalization mixing

Cited by in corpus (2)

• MLAnalysis: An open-source program for high energy physics analyses
• Polarization measurement for the dileptonic channel of $W^{+}{W}^{-}$ scattering using generative adversarial network